Interesting. I never did well in school after about age 11, quit school at 16 with 8 'O'levels (this was in England, where leaving school at 16 was totally normal back in 1979), and didn't go to college. Dh moved around many many schools, as his dad was in the military. He spent alot of time in the principal's office, did actually start to apply himself in high school, got his diploma, and didn't go to college. Having said that, I do see spelling and grammatical errors in posts, and mostly my thought is that the writer was in a hurry and didn't go back and check what they had written. I don't think I have ever thought it was a marker of "lesser" intelligence.