The show goes for about an hour and a half, which is fairly comparable to any of the other concerts I've been to (non-Coldplay). Hartford was my first Coldplay show and loved it.
However, the full show was great, very high energy, and there was never a period of boredom. Some fans may complain about certain B-Sides and older songs (personally, I would have liked Amsterdam and Moses), but they covered all of their major hits from the previous albums, with "Trouble" being I guess the song that most ppl wanted to hear. I may have also liked to hear perhaps a U2 cover. But my gripes are being nitpicky, they are minor.
However, the show was sweet for the entire time and never dragged. Although let's say a DMB concert is much longer, those drag for a while when each song is like 10-15 minutes long.