dogcatfish
I would think not. Although I am aware that certain add-ons such as the LevelD 767, PMDG 737 & 744 and the PSS Buses are very accurate from a systems point of view and the VATSIM ATC is also very accurate I don't think it will score you any points with a selection panel, it could just make you look like a
You could put a very short bit in your application form as a hobby but remember they'd be more impressed by outdoor activities and team sports than they would by someone saying they sit in front of a PC for 9 hours to conduct real time transatlantic virtual flights.
All the best
SW