5 minute commercial break

Tonight I'm watching Big Bang Theory and I start FFing through a commercial and I notice it seems to be taking longer then usual. So I enable the clock (SPS9S) and look at the exact times. Commercal break starts at 12:50 and ends at 18:08. That's over 5 minutes long! What happened to the days when Chuck use to say "be back in 2 and 2"? 5 minutes is insane! I checked the show and there is only about 20 minutes of the 31 minute recording that's actual show. There are over 11 minutes of commercials.