I really don't see how "practice and practice" has any relevance to what I said. They are clearly talented musicians and I love their album (and I loved their EP and tried to get everyone I knew to listen to it), but they've had a lot of things line up for them in order to get their album to the point of popularity that it is at right now. I'm absolutely elated that they have found a greatly deserved amount of success. I'm giving them credit. My point was that this will not be the norm. Most great bands will toil in obscurity without the recognition they deserve.
I do disagree with your idea that people listen to a "practiced" and "refined" band if they are recommended to. It's been my experience that most people tend to listen only to whatever crap is most convenient and hardly make any effort to listen to a recommended performer outside the realm of what they are already complacent with. Most people don't care about original music unless it flies directly into their line of site.
i'm saying it's not the exposure from ads/plays/syncs/etc. just bc you're in a commercial or have a good tv spot doesn't mean you'll pull in sales from it. you will some, but not a ton. unless the music is really good. people talk about good music w/ passion. passion is contagious. that's where real fans (and in turn, sales) come from.