I still haven't even bought my first smartphone so... no. didn't get an iphone 5. I really don't get the whole 'upgrade at the first day it's out' thing. I think I am too thrifty.
If I had the 4 or 4s I wouldn't have upgraded... but my upgrade was available so it was the same price as it would be in 6 months from now. Our local AT&T store had them available so we took advantage of that.
I know people who are paying full price for these phones ($650 for the 16gb!!!)- I could never imagine doing that! That would mean they already have the 4s, probably, which isn't a big enough difference to upgrade in my opinion!
I have the smallest data plan since I'm usually on wifi and never go over on my data usage- I think it's an additional $15 a month for the data plan I have. Our phone bill is $30 higher with 2 smart phones vs. normal phones.