A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
I suggested flightaware because it's easier to remember how to find on the Internet.
However, Result Unknown doesn't sound like proof at all.
I wonder whether there's an ATC or FAA database. Somewhere there's data to calculate on time arrival stats by carrier.