I understand though I don't think Intel's graphics are worthy in the 15" rMBP right now even if Haswell is supposed to be a big improvement from Ivy Bridge. Unless Apple were to really cut the price and have a 15" at $1,499, the top 13" at $1,299, and the base 13" at $1,099.
Intel's graphics are getting better and are suitable for the MacBook Air, Mac mini, and 13" retina MacBook Pro.
The 15" retina MacBook Pro should have the best nVidia graphics possible and should not use integrated graphics under any circumstance. Sorry Marvin.
It's a crude reference wizard and I think it's false anyway. People will watch WWDC and if no info on the Mac Pro is release, there will be severe disappointment from those still sticking around. If it does get some spotlight, people will have a reaction of "Finally!"