"In response to feedback from our viewers, we started offering a commercial free experience on Hulu. For a small number of shows, however, we have not obtained the rights to stream commercial free and they are not included in our No Commercials plan. You can still easily access these shows with a short commercial before and after each episode with no interruptions during the episode. Specific shows that still have commercials accessible through the No Commercials plan will be noted throughout the signup, switching and playback experience. While the list of shows may change, they are currently: Grey’s Anatomy, Once Upon a Time, Marvel’s Agents of S.H.I.E.L.D., Scandal, Grimm, New Girl, and How To Get Away With Murder."
It's seven shows, and even on those the ads are only at the beginning and end they don't interrupt the show. I say we cut them some slack.
I can't verify this for myself, because, although I'm a top-tier subscriber, I've never actually run across a Hulu commercial in the wild. Whichever shows those are, I guess I don't watch them.