Yes - I realize that the commercial load on music radio today is probably no worse, or perhaps even better than in the heydey of Top 40, when it was song-2 commercials-song-2 commercials, etc. And the advantage today is that you get to hear 4 or more songs in a row without interruption. The problem is - a five to seven minute stop set is pretty mind-numbing. I generally change the station.
If I were an advertiser, I wouldn't be thrilled to have my commercial 3 minutes into a 6 minute stop set. I would want my commercial right after the previous song. Perhaps advertisers can pay more for placement these days(?)