I've never read a more clear article than this on why to prune or not prune
http://www.finegardening.com/how-to/articles/pruning-tomatoes.aspx (http://www.finegardening.com/how-to/articles/pruning-tomatoes.aspx)
This year I'll try clipping off the tip 30 days prior to last frost to ripen the last trusses faster.
Very informative, thanks for that! ;D
"The intrinsic vigor and hardiness of tomatoes almost always guarantees a successful harvest."
after the first line I couldn't go on :D