I think you're right. I've gone back and read some of my own posts here and winced at what the combination of one-handed typing as I hold onto a handrail on a packed subway plus autocorrect did to what I thought I was saying.

I make an effort to use correct spelling and grammar in everything I write that's longer than "ok i'll check when at office", but sometimes it slips past. People still seem to understand what I'm telling them, though, and that's the ultimate goal.