Rack'n'Stack, From what I've heard and seen no-one is blaming ATC on the delays due congestion. We understand your doing the best you can despite extreme circumstances. I always thought ground controlling would be easier than Approach/Deps etc but just listening to ground between 0545-0700 I have changed my mind.
The delays Skywest are contributing to the congestion are more a reflection on the lack of facilities/space both in the terminal and on the tarmac. You could possibly blame WAC on their lack of foresight in constructing more taxiways, terminals, parking etc but I don't think anyone could have predicted the BOOM was going to affect aviation in WA as much as it has.
For your info, The departure times are based on an aircraft pushing back or taxying off the bay so waiting for 20 mins at the holding point does not affect the on time departure stats. However, one thing the congestion has caused is the inability to tow aircraft to their bays on time, hence a delay.
Please don't take offence, No one is blaming ATC.
Cheers