Totes. One of the remarks I usually get when I meet people I've talked to online is "Wow, you are SO much less of an asshole in person!"
LOL, I get the same thing. Except I wouldn't say I'm less of an asshole. It's just that people appreciate it more in person. Sometimes they think I'm trying to be funny, but I just say what's on my mind. It might be rude, but it's the truth.