Quiet enough here considering we have an All Ireland final at the weekend. Someone mentioned on another thread that not much importance is placed on U21, and that maybe true in Dublin, but when Tyrone and Mayo won it recently it was a big thing for them. Likewise for Tipp for making a final.
There appears to be a huge correlation between multiple successes at U21 and continued success at senior. The successful Kerry and Tyrone teams of the recent past were preceded by multiple u21 wins 5 or 6 previously. Likewise Dublin's current success was preceded by Under 21 wins. Single under 21 wins don't seem to mean a lot, but a few bunched together are a definite indicator.
Now there is an argument over whether it is just an indicator of what would happen anyway, or if the U21 win in itself helps the senior win. I think it is a bit of both. If a team didn't enter the u21 or lose in the first round, they would still have the good players coming through anyway, but by winning U21 they get a whole season of inter county training and they build a profile for themselves with less chance of good players getting lost among the numbers.
Apart from all that, it is an inter county All Ireland.