Torchwood UK/US changes

When Torchwood (eventually) airs over in the UK, the program will be slightly different. The editor of Doctor Who Magazine Tom Spilsbury has tweeted:

"Interesting that US Torchwood will have bits UK won’t & UK Torchwood will have bits that US won’t"

Then later on:

"It’s to do with the episode timings in the US and what’s suitable/unsuitable to be shown on the BBC in the UK"

I think the US has different tv laws but I'm unsure. Hopefully when my DWM falls through my post box, infomation will be longer.