One thing that NMH had going for it over the other members of E6 is that while the majority of the E6 Collective was built around a retro-60s psych/power pop sound, NMH was kind of doing a more modern thing, or at least one similar to where part of the industry ended up going. I wouldn't necessarily say they were more inventive or artistically impressive than the other members of the collective; I mean, Apples in Stereo is a pretty versatile band that isn't afraid to do some kinda strange, experimental things (*) but NMH's style was a more modern take in comparison to most of the E6 bands where you could pretty read the influences and tone they were trying to recreate. I don't think it's a huge shock that arguably the 3rd most well known band (after NMH and AiS) to emerge from E6, of Montreal, really got its big break when it shifted away from its original psych pop influences towards a more modern, electronic sound (*one could argue the same thing about Apples in Stereo, given their resurgence was fueled by New Magnetic Wonder which seems to be a pretty conscious move towards a more modern experimental rather than the psych/power pop sound of their earlier albums).
In comparison, if you look at bands like the Apples in Stereo, The Essex Green, The Ladybug Transistor, Beulah, etc, you can pretty easily read the 1960s influences and tone they were aiming for...and that's just not where the industry is nowadays, where it was 10 to 15 years ago, or where it looks to be going anytime soon. Hell, outside of The New Pornographers, how many bands in the last 10, maybe even 15, years have had any kind of mainstream success featuring a primarily power pop sound? And they didn't exactly come out of nowhere...a project with the indie star power and name recognition of Dan Bejar, AC Newman, Neko Case, et al, is going to get a lot more exposure than your average bear. At the end of the day, I'd rather listen to The Long Goodbye, The Albermarle Sound, Tone Soul Evolution, or even Yoko, before I'd ever put The Aeroplane Over The Sea on, but at the same time, I could see why a music industry exec would single it out.
A couple songs, just because:
http://www.youtube.com/watch?v=BlRsXlH9aDQ&feature=kp
http://www.youtube.com/watch?v=Pqf3Kn_HzjA