I suffer from random dropouts! Sitting at home browsing YouTube 50mb of data used just like that. This far into October I've reached data limit already + have had to turn off cellular data because of the drop outs. On ip4 and ios 4 + 5 I was fine !
Hope they fix this issue in 6.1 or 6.01 but probably won't release a point update until maps is better, you + I know it's backend but general public probably don't.
I'm having the same issue.