I can get 5Mb/sec with 3G/4G. I could actually get more like 18Mb/sec according to my deal, but I live in a place where the reception is not so great. And this at with actual speeds, not the ones the providers throw around (which are 8 times larger than what we really get since they measure with bytes and everything else uses bits: http://en.wikipedia.org/wiki/Data_rate_units). The internet I have is actually marketed to be 150 MB/sec. So yeah, it's definitely possible...