Totally agree. I'm 22 and I have never in my life signed for anything when paying by card. It's always been chip & pin which is far more secure and quicker. Infact a lot of places I just place my card on the terminal and it's paid for using NFC.
When I was in school and worked as a waiter at a certain nice fine dining restaurant for around 5 years every time an American was in and wanted to pay by card I was literally like 'oh great here we go' - literally had customers from everywhere on earth yet it was the yanks that still sign their receipts. Why? I have no idea, as I sure as hell can't be bothered checking the signature.
I actually think something like Apple Pay would have been better hitting the UK first, it's actually pretty quick at adopting this sort of thing and everyone here has an iPhone (so many would upgrade to a 6). I'd say 60% of the places I shop at support NFC cards and I know most would love to pay using their iPhone.
Lets hope this isn't like iTunes Radio which hit the US and never crossed the pond. The sooner Apple Pay arrives in the UK the sooner I'll be inclined to upgrade.