Re: Actually
I use 5 GHz for exactly that reason - but have 2.4 GHz enabled on the access point too, because my mobile handset (like most, if not all) only supports that band, ditto my old (relegated to occasional use) laptop and the bedroom satellite box.
Mine's actually the only 5 GHz presence I've detected, against half a dozen or more 2.4 GHz nets fighting each other. On the bright side, moving nearly all my traffic up to the higher band means I'm contributing very little to that mess of interference, as well as experiencing very little myself.
It's a shame 5 GHz support isn't more widespread, though; a nice surprise that the Nexus 4 apparently does support it.