My guidance counselor as well as extremely discouraging, however after being at MIT for two years, I'm inclined to say that admission to a university like mine hinges on both being an interesting person and possessing demonstrable intelligence - not necessarily through scholastic channels.
'04-'05 seems to be the last year MIT reported high school GPA's [1]; probably because the number is meaningless.
[0] http://www.acceptancerate.com/schools/massachusetts-institut...
Standing out exceptionally in one category (such as extracurricular projects) is not something the average admit to MIT posseses.
[1] http://mitadmissions.org/blogs/entry/how_to_do_everything_wr...
Selecting the top 10% of those gets you 1700 students, which is quite close to the size of Harvard's acceptance statistic (of 2000)
The person you're replying to indicates that 10% is 1700, and that 10% may be more representative of the high-EC and 4.0 level.
I'm not sure a few thousand folks from around the country qualifies as 'bunches'. Thinking back to my high school days, we had only a handful of people who were both academically advanced and active in many EC - sports, music, theater, etc. Partially there's just not enough time in most people's days to get 'good' at multiple things, even if there's aptitude. Secondly, not everyone can actually afford to get involves in a lot of ECs (despite aptitude/talent).
I can't think of anyone I know from my school (class of over 600, IIRC) who was all 4.0 GPA who also did multiple EC work. We had people in both camps. And I had a pretty lousy GPA, but did much better on ACT than some of the high GPA kids.
I know someone who got into an MIT engineering program roughly around '03 and they claimed to have below a 500 on the old SAT verbal section (scored perfect 800 the math though).
Their claim was they purposefully did not study for the verbal section because 'excelling at rote memorization to get into the top schools in the world is idiotic at best,' something like that.
I was a solidly B student in high school, but I had some extracurriculars (not quite building fusion reactors) that I devoted an absurd amount of time to and excelled at. And I got into MIT.