Shows on UPN like Enterprise usually have 3.5 minutes of commercials between segments. Well sometimes they’re nice and only give us 3 minutes.
I too have seen what effac3d said about shows cutting out parts to make more room - some of the funniest parts of the Simpsons have since been deleted (like when Homer’s dog ran after George Bush Homer says “stupid dog…hmm you could say he’s barking up the wrong Bush”…then you hear his brain say “there it is Homer the smartest thing you’ll ever say and no one was around to hear it”…DOH!!!).
and I agree with Computer Guru, radio commercials are LONG. I listen to talk shows and they stop at 00-05, 15-18, 22-24, 28-29, 30-35, 42-44, and 56-59 past the hour every hour for ads (ok a few minutes of it is news, but not much). Sometimes more. That’s over 20 minutes of ads an hour.