I'd also classify the...GBA as 16-bit.
Um...what?
The GBA(Gameboy Advance) is supposed to be 32-bit.
Doom and Wolfenstien for Snes,and the unreleased in everywhere but Brazil Duke Nukem Megadrive couldnt compete with Doom,Wolfenstine and Alien versus Predator for Jaguar. As for 32X,it did use 32-bit processors,wether you want to classify it into whatever doesnt matter,because thats your opinion,not fact. As for the Jaguar,while I stead fast agree it didnt look like 64 bit graphics,it easily held its own with 486 DX and Pentium 1 gaming graphics,which fall into the 32-bit catagory up untill 3D accelerated graphics cards were made available like the VooDoo 1.
Big sorry in advance here but I am going to be posting comparasons and its going to be taking up some space. I cant help it. I cant stand to see someone sit there and make such obviously stupid bias comments about a couple of systems even if they are just opinion they are opinion with no real foundation to stand on.
Granted the 32X and Jaguar were not the best,or even great examples of how 32-bit and 64-bit systems should have been,and yes they did fail. However it may have played out though,the fact remains that they obviously were not 16-bit,and in saying they were it makes it look like you think Model 1 games and Pentium Pro era games were 16-bit also. This is a mistake on your part,and not the fault of the systems being discussed here. All of them did have some shining examples of the power they had and what could have been if not for lack of solid support. A good example is MK 2 for Snes compared to Ultra Vortek. I will play Ultra Vortek any day of the week over a crap 16-bit port of MK 2. Some of the shining examples you mettioned for Genesis and Snes are infact not good examples of what those systems could do. At the rate you were going Im surprised you didnt say Stunt Race FX was better then Virtua Racing for 32X.
By the same logic as comparing the Jaguar or even 3DO to SNES/Genesis to show how much more powerful they are
and therefore 32-bit gen, if you compare them to the Saturn/PSX there's
an even bigger gap.
As for
Turbografx-16/PC Engine, it used 8-bit processors,wether you want to classify it into whatever doesnt matter, because thats your opinion, not fact.

I don't consider the arcade of MKII 32-bit, let alone any ports. If Model 1 is 32+bit, does that make Model 2 64+bit? This is why I don't normally classify arcades by console generations.
I don't really consider the PC-FX a real 32-bitter either(
ready to be flamed + banned 
) and the N64 is 32-bit to me.
In my mind, the Dreamcast is part of the same generation as PS2/GC/Xbox.
I think that the SMS is closer to 16-bit than it is to the NES, basically all it needed was extra processing power. But I still call it 8-bit. So you can see how selective I am.
If the Xbox360 never received any 3D games and only received simple 16-bit'ish 2D games, I'd consider it more or less part of the 16-bit generation, regardless of generally untapped power.
I also believe that the Jaguar could've handled a port of Virtua Fighter better than the 32X's, at least match all of the 3DO's software and push some 3D that would look decent on Saturn/PSX...
if the right people developed for it.But as the software available overall is, it feels more like a 16-bit platform to
me. But I'd take a high end 16-bitter over a low-end 32-bitter anyday.
As for the screenshot comparisons, I
do think that both the Jaguar and 32X are awesome and I would have loved to see more great 2D games for them.
But that SF Alpha SNES pic looks
amazing next to the arcade's, considering what the SNES is.
And those polygonal arcade, 32-X and Jaguar games
do crush Star Fox and other Genesis/SNES 3D games. But try comparing them to the best 3D Saturn and PSX games with full texture mapping and a ton of crazy effects. The Saturn/PSX mop the floor with anything on Jag/32X/3DO
much more than the latter 3 dominate the Gen/SNES.
But don't worry, I won't call
you stupid.
And I don't think that PSX vs Jag screenshot comparisons are necessary.
Basically, I guess the way to sum up my personal classification of a console's 'generation', is by how close it/it's overall software is to each generations' main/most successful consoles.
So I guess I'd group systems by how close they are to the following: NES, Genesis/SNES, PSX, PS2, 360.