There is a large group of English speakers that don't use the -t irregular verb form. They speak American English.
Then there's this other group and they seem to be split on whether or not to use it, and these are the British English users. In British English, you say burnt, dreamt, spoilt, smelt, etc. Yet a lot of the speakers here, on a predominantly British forum, use burned, dreamed, spoiled, smelled. A lot of them say "you can use either" when asked, but you don't see these same people talking about colors (colours) and checks (cheques).
So why is this? Are the irregular verbs just too hard to remember or are we consciously succumbing to an aspect of American English that seems simpler. I mean, the web is mostly American English, so doesn't it make sense we'll eventually speak it?