Wow, what an absolute crock that survey is. An average persons IQ is significantly more than 80, so theyve obviously handpicked responses/results to optimal effect.
As for any sort of "vs." nonsense in regards to browsers, they all have pros and cons. I actually like IE 7 and 8 and dont like Firefox, but that's down to taste rather than intelligence. Neither are flawless. All browsers borrow ideas from each other and all differ slightly from each other in terms of implementations of different standards. Anyone who argues otherwise is as stupid as the "survey" itself.