Thanks for the long post, but I think the general idea of that was already clear in this thread. I for one most of the time listed "more modern architecture" in my posts when comparing next gen GPUs to this gen GPUs to account for the facts you listed in detail.
And what do we have apart from some numbers like GFlops etc. to compare GPUs in a simple way? Of course the only real way to compare gaming performance of different GPUs would be to list different gaming benchmarks. But we don't have that (and it would be far to long for the opening post to list dozens of gaming benchmarks). GFlops etc. at least give you general hint how powerful a GPU could be (yes it might be off by a factor of 2 or 3 or something when comparing different architectures, but the XBox720 and the PS4 seem to go with AMD GPUs and most likely both will use the VLIW4 architecture).
From the PC-gaming benchmarks I know of VLIW4 most of the time really is around 20% faster than VLIW5 (when games are optimized for it, like e.g. Dirt 3). So once we know exactly what architecture each GPU uses we could include a remark mentioning this in the opening post. But do we even know what the WiiU GPU uses? VLIW5 seems a lot more likely, but we don't really know yet.
edit: but thanks for the link to alienbabletech.com. I'm helping with the purchasing advices for PC gaming hardware at an other forum and 'til now I always searched a couple of hours each week to find the newest GPU benchmarks/tests (most websites only test around 5-6 games and that's not nearly enough to get a good estimator for the average power of the GPUs). Is that your list?
