With revo the ecu is flashed with all the maps (ie stock 95, 98 etc) and these can be swtiched using select or select+, its there version of the standard map
select and select + merely are a tool to switch between the maps and don't store them, if your dealer reflashed the ECU Revo would need to be reinstalled (which they do)
as SteveP said in another thread if they look into it deep enough they could probably tell, however, for superficial purposes falsh counter should be zero
a few of us have mod friendly dealers, i alwasy switch ours back to standard to and tell them so they don't feel the urge to go for a test drive