DVR6K I would be highly surprised if XL's NCL operation is among the highest for ontime departures as the TF reg 737-400 they have based up there is quite unreliable and certainly over the past weekend delays have been fairly lengthy to a couple of flights. It was the same last year, maybe XLA will take notice that this a/c lets them down and replace it. It also has to tech stop quite often on the longer routes out of NCL. If XL intend on keeping it why not send it to a base in the south, where distance is less of an issue?
On a positive note, the finnair 757 is performing well, as is FJE who have been subcontracted out for 3 years by XL for operation at NCL.
Tommyinyork FJE have had delays, not many I say, but it happens to all airlines and I don't think they are the worst for delays this summer, they seem to have improved since last year.