If I were you I would return to the ride, but return without your computer. I'm 90% sure that the reason you got dropped was that you were flipping out over the 27mph pace you had settled into, not because you couldn't handle it, but only because you've never been there before. On my casual training rides i rarely exceed a 20mph average for the ride, but i can jump into races and group rides where *on the flats* 30 mph speeds are held for over an hour. Maybe it has something to do with a lack of confidence riding in a pack and really taking advantage of the good thing you've got going when you have other riders to bum pulls from. But 27 isn't that fast on a flattish road in a group.