Convicting, isn't it? I grew up in a regular evangelical church where the service was typically 60-70 minutes long and I usually started getting antsy at about the 40 minute mark. I could sit through 9 innings of a Cubs game by age six without a problem and if there were extra innings all the better! But extra sermon at age sixteen? No thanks.
I'm not sure why we do this to ourselves. We get all dressed up (well...some of us do anyways), we drive (or walk) to church, and then when we're there we can't help but steal that glance (or four) at the clock on the wall. We hope for overtime, extra innings, a double episode, or another hour with our date. But extra sermon? No thanks.
Here's something I wish I had been challenged to do long ago: treat the worship service like you're in the very presence of God (you are), treat the faithful preacher like he's Jesus preaching to you (he is), and believe that your time in corporate worship is the most important time in your week (it is). Worship with God's redeemed people is an incredible blessing. Worship is time for the living God to receive our praise, bless us through hearing our prayers, and to correct us, admonish us, teach us, and train us for the work he generously gives us to do! Why would we come just to leave?!
And, oh yeah, if you can get rid of the clock on the wall...go for it.