Lot of different DTX models, with a LOT of different samples in them...

He didn't say how many, he didn't say which ones, he didn't say which DTX they came from.

I wouldn't call him a liar, just that Yamaha have only halfheartedly at best brought a few DTX sounds over...

You want these sounds in your Yamaha? It's easy... Buy a DTXIII module, MIDI it to the Tyros...