I highly doubt these are the imitation jumbos that's supposed to sound like bowls without being as big as the original jumbos.
Reason why, is these jaben jumbos may be tiny bit different but the shape seems exactly the same. And as project86 mentioned they seem to sound the same.
I'm now pretty convinced the ebay pads are the illusive jumbo bowls since they seem to sit flatter and that indicates they aren't as far out.
I'll be picking up a pair tomorrow or so. But I can't post results till I get my cups. BILA BILL! Please make me my cups =D