Which Raw are you talking about? date?
Looked it up and it's August 22nd. Like I said I may be mistaken, but I know Punk gained 1,000,000 with someone at least once.
And honestly, Punk is a good enough draw to the point where if he has a good angle, whether with a proven draw or not, he'll get good numbers. Yeah his best numbers came when working with proven draws in Vince, Cena, and HHH but he also had a great angle going into those and that's why the numbers were as big as they were. Then there was the OR where his segment with Ace gained 800,000+ viewers, and at the time I wouldn't call Ace a draw by any means. He was still developing into a true heel. Foley being in the segment might've helped though no doubt, but Punk has been in some big gains and one of the highest segments of the show with or without a proven draw.
However, what separates him from a true proven draw though is if he's put into an angle with no story, no good build, and is a throw-a-way for the most part, he won't do extremely well. But he holds his own well enough. It's just guys like Rock, Taker, HHH, Vince, Cena, etc. when put in the same situation, would more than likely pull in bigger numbers.