"Basis is this:
1. Personally, I've seen both systems and games live at E3, Gamescom, and PAX. Played a little bit of PS4 games at PAX. There are great looking games on both systems. Ryse looks great, Forza is fantastic. I think Killzone looks awesome, and honestly have not been impressed with DriveClub (although it came a LONG way since E3). I really would like to see Infamous in person, but it hasn't been shown that I've seen. However, any difference between those games is subjective of course and subject to viewer bias, but looking at both systems it's hard to substantiate any claims around 40% - 50%
2. We're in the final stages of game and SW development now. We're working closely with 3rd parties as we approach launch. Reports we're hearing back from developers consistently are confirming that cross-plat games are running the same on both platforms.
I believe there is a point back near E3 where developers would have said their games were running better on PS4. I think Marc Whitten made the point that we'd just completed some driver work about a month ago just before Gamescom. And look at the frame-rate improvements in DR3 between Gamescom and PAX. We're making huge strides in our SW stability, and again, we have customized and balanced the system to reduce bottlenecks and optimize performance, in ways that aren't seen in the published specs.
As to the follow-up questions; I posted earlier I'm working with the engineers directly who I think (and you guys think) will be more credible than I am. I did say that I went to them for some supporting points which I posted here - so at this point it's probably best to let them speak on it. I'm not sure when, but more detail will show up.
It's late, and it's clear I'm doing more harm then good at this point. So best to let this rest from my seat and get back to you guys with the most credible source."
Wow, first I've heard somebody make such a bold statement. This post of Penello's seems to have gone unnoticed but I think it's a big deal.
In the past Penello has said more like "differnce wont be that big", but here he's saying developers are telling him they are equal.