I, for one, am really looking forward to this. I don't use any 3rd party IR's as I don't want to audition thousands of mic placements or go down the mixing IR rabbithole. IMO, Cliff is doing the work to get great sounds in a shorter period of time so that I can focus on playing my instrument and exploring cool effects rather than worrying about what mic to use on a cab so my tone fits in a mix.
The thing about Jay is that he knows a CRAPLOAD about speakers, but has to make sure that everybody else knows he knows a crapload about speakers, which makes him look like a dick. I've had my run-ins with him before and it's his need to be right 100% of the time that drives me crazy. He yelled at me for defending him in an argument one time. Who insults somebody that agrees with them? Jay does. Apparently, I didn't use the right compliment. Based on my interactions with him, he's a Grade A know-it-all asshole. I don't care if he wins a Nobel Prize for his speaker designs, there's still no excuse to laud it over people. I know plenty of experts in their associated fields that aren't complete dicks, but unfortunately, Jay is not one of them.