Ahh, good to know. I know that was a rumor, but didn't know they were marked. I believe that's who made their old non-locking tuners, back when their locking option was Sperzel, too.
By most accounts, they seemed to be "maybe a little better than average" for a licensed Floyd, and there was at least one person I remember from the forum who changed his DC727 or DC747 to an OFR and said it wasn't worth the effort as it wasn't that much better to make up for the work needed and the cost.
They didn't say "Ping" on them, but the saddles had the same markings, and the underside of the baseplate had numbers in line with known Ping units.
We'll probably never know 100%.
You're right though, they really weren't bad.