I've come to notice I'm a bit of a thread count snob. If there is a topic I find interesting and it already has 100+ replies I'm less likely to open it and read/contribute. It seems I assume once you are over 100+ posts most things that need to be said have already been said, or I'm just too lazy to read a thread that long.
Not that I don't ever jump into a well established thread, I've just noticed it seems I'm less likely. I enjoy being part of the discussion more from the beginning than jumping in late.
So how about you? Does thread count affect your responding to a thread?
Oh and regarding sheet's, I'm definitely a high thread count kind of guy.