While I will be the first to agree that far too many passengers take forever and a day to get themselves settled, for the most part they are the infrequent travelers that are unaware of how their bag will fit in the overhead, can't manage their own luggage, etc.
It takes me under five seconds to get my bag into the overhead. I don't pack it full of rocks.
What I can't believe is that they haven't been using the sizers at the gate lately. Deal with it at the gate and it's won't slow boarding when people can't fit their bags in the bins.
What drives me crazy is watching a family get on with a ton of carryons, little kids, bags of Disney souvies and taking forever to get down the aisle with all of it, or the older woman who can't carry her own bag, let alone put it in the overhead.
As I said before, I'd be happy to pay a small extra fee to carryon my bag so I didn't have to waste my time waiting up to an hour for it to come out the other end. Many of my trips are only two days, start to finsh. The last thing I want to do is waste time waiting for my little bag. And there's no way I'm checking my laptop or camera gear.
BTW--I heard a rumour that US Airways is going to put bin dividers in so that if your rollon can't fit in with the top facing out, you'll have to gate check it. So many of the currently "legal" rollon's are going to quickly no longer be legal.
Anne