Why can't a developer who has access to the system's technical specifications know whether or not it is on par with current gen or significantly beyond? Why wait 2 years? Do we also have to wait 2-3 years to confirm the Vita is a lot stronger than the 3ds? I think if he knows the specs and is currently programming ps3/360 games for it, it would be pretty obvious where it stacks up.
Because he's talking from a personal perspective, based on early dev kits (latest ones were recently sent and are not the final ones); of what the (separate) team at Vigil is doing with it. And since last year, they've said the same ..that their focus was on the controller first and if they had more resources, and time..then up the resolution and other things.
Is like back in 2005, when Itagaki said this about the Xbox 360:
In an interview published in the latest issue of Famitsu Xbox Magazine, Tecmo producer and Team Ninja head honcho Tomonobu Itagaki talked more about his impressions on the Xbox 360. When asked about the console's triple-core IBM PowerPC processor design, Itagaki called it a "buffed-up Sega Saturn," as the old console was also multi-processor, coming with two, 32-bit CPUs. He said that a single-CPU machine is easier for programming, but multi-core structures have become the recent trend.
While making DOA4 with alpha kits (same alpha kits Microsoft used to demo stuff at E3 back then).
When developers "talk like that" they usually mean in other things, more than just actual power of said hardware. In that case, Itagaki mostly was talking about the multi-core CPUs, but that quote was taken out of context many times back then, under the assumption that the Xbox 360 was going to be "on par" with the Xbox. When multiple sources and developers (even the same Itagaki) said otherwise.
Then there were the usual comparisons about how the 360 was a buffed-up Xbox, how it wasn't going to exceed PC games...just like every gen.
In this case "on par" goes as far of what they've been able to do with their (up to that moment) dev kits; doesn't paint an absolute picture of it.