You'll also see that it ALWAYS comes up on UKY--often from those who haven't been here long coming on in shock and amazement. I'll admit, I find the amount of fuss about mixer taps to be a little silly sometimes--don't flame me for saying it.
Personally, I don't see the big deal. I haven't had mixer taps here until we moved into our new house which has one or two, but I still find I don't use the taps any differently. Yes, it was different at first to have the hot and cold come out of separate taps, but I adjusted. I turn on the hot water, and wash my hands--it isn't coming out piping hot anyway right off, so it's a fine temp with just the hot. If I really need it to be more hot, I wait a moment longer to wash my hands or face. I've only had the problem of it being boiling hot in public toilets that are constantly being used and then I just turn on the cold too and do a sweep to the side to get both temps.