Once you've got a reasonable average 3G speed of 5Mb/s speeds though if you've only got a 2GB allowance a month I don't see why you'd need so 80Mb/s speed where you'd use the allowance in a couple of minutes.
If you're going to use the 2GB over the course of the month as you suggested, then the data speed isn't really that important. Whilst GPRS sitting there churning downloading an app for 20 minutes might be a battery drain I doubt there would be much difference in battery drain between 5Mb/s and 80Mb/s.
It has always seemed odd to me that people go mad for crazy speeds and love running the speed tests, but with such low data caps you realistically get limited benefit, even with an 8GB cap you're really not going to be benefiting from the speed much otherwise even then you'd burn through the allowance in minutes still.
As I always say, there's nothing you can't do on a 5Mb/s connection that gives you much benefit over 80Mb/s, especially on a single device mobile phone with the kind of app size that is typical, or the kind of things phones do.
It's cool to test the speeds, it is possibly arguable that more capacity means faster speeds in congested areas or more future proofed, but even then it's a bit of a push of an argument as other networks have plans to keep up with demand too and if you're capped to 2, 4 GB etc then to me that is very restrictive and I'd rather have unlimited or a bigger allowance over pure speed.
It's a shame that EE don't give bigger allowances at the cost of speed, Three could give 500MB packages to all and end unlimited and everyone would get even better speeds, but I'd rather be able to use more data.
EE's customers use 1/4 the data use of Three customers, presumably because they are so restricted and have to watch their usage because of capped allowances and the cost of the bigger data packs.