Most the records that are the most important to us are "informal" records. Quickest LB7/LLY/LBZ/LMM, quickest Fuel-Only, quickest stock charger, quickest XXX, etc, are all informal records. Sanctioning doesn't mean a whole lot to 90% of us.
If you are the Quickest ProStreet, is that NHDRA, DHRA, NADM, PDRA, etc, does that mean you were Street Legal? 6500lb, 6000, 5500, 5000, 4500? It depends on the rules and the year. A ProStreet used to be a full-frame, steel body, 3/4 ton, street legal and registered. Now it is pretty much just a full-sized truck, but tomorrow that restriction might be removed as well. Is a 2005 ProStreet ET equal to a 2009 ET? Nope, the rules today permit mods that were banned in the past.
ProStreet means just what is accepted now. 9.31 is blazing for diesel pickup. But if he races JoeBlow's ProStreet who claims 10.10's, and gets his ass handed to him, not only is not the fastest ProStreet, he's not even faster than Joe.
Put in a better perspective: Let's say Sammy runs 9.90 with his daily driver at Bandimere, and that's the only track he runs at. He probably will never be eligible for "Quickest ProStreet", even when ten guys with 9.40 timeslips in Kentucky show up at Bandimere and run 10.50's, and he whips all of them.
Who is faster? Sammy, or the Timeslip Crew? The Timeslip crew have cool paperwork, but the most important field on a timeslip is that WIN banner. Believe it not, drag racing competition existed before ET slips, and that part has never changed.
PS - No, I was not racing before timeslips existed. They were a handwritten slip with your #, WIN/LOSE/FOUL checkboxes, and something like 13.85 @ 101.08 written on the bottom. No R/T, 60's, etc.