the other advantage with nitro is that you have full engine power until you run out of fuel.
i have no experience with brushless, but assuming that they pretty much work the same as a brushed motor...you gradually loose power as the battery goes dead.
nitro is expensive to buy, but a little lasts a long time.
one thing that i do know for sure when it comes to electric vs nitro, is if you take it and run it somewhere like a park, alot more people will be interested in watching the nitro  over an electric truck for some reason. it's probably because nitro is a bit exotic as compaired to an electric.
i think the majority of people who don't really know r/c, associate electric r/c's as toys (like the ones they buy their kids at wal mart) and gas ones as "professional" r/c's.
either way they're both a blast, but i love my nitro volcano over my brushed electric duratraxx evader.
my evader has a ton of aftermarket parts and it's fast and torquey, but it just isn't as fun to me as running my volcano.