The T20 games attract massive crowds in the evening. The majority of people at the 4 day games must be pensioners though. At an 11 o'clock start an awful lot of people disappear around tea to go home. A two o'clock start still means most workers will have missed two sessions before they make it to the ground at 6. The weather has been great this last week (even in Wales!), but generally it's too cold over here to be sitting out all evening till gone 9, especially when you have already wasted the chance of playing on a sunny morning!