i have seen the three rating sheets.
the first thing that i learn from them? the reviewers don't read the application very carefully
all of them make inaccurate statements about my application. for example, one says i started research early as an undergraduate, but i actually started research during 2nd semester as a senior. another says i got an award paper in an IEEE workshop, but it was an acm conference. another says i am currently a TA at school X (undergraduate institution), but i am a currently a TA at school Y (graduate institution).
i got an HM with these ratings:
Intellectual Merit: Excellent, Excellent, Very Good.
Broader Impacts: Good, Excellent, Very Good.
they mention my weaknesses are the vague research plan and broader impacts. for the research plan, i knew it was vague (did it last minute, so had a couple days of writing the research plan), but i thought being 1st year, it wouldn't hurt as much. guess im wrong.
none said anything about my undergrad GPA (~3.5 from a top 5 CS school) or my low verbal GRE (<500), so it appears they didn't affect my chances.