FWIW Bill, I think the styles, for the most part, are very good to excellent on the Korg. In particular the Funk and R+B stuff...There are a couple of decent dance/trance/house styles too.
The styles on the Yammies are also excellent. The country, ballroom, pop and middle of the road ones all standouts.
The Roland has Jazz totally covered. The best!!
Ketrons have excellent country and rock.
Now if there were some way we could get them ALL together on one
Seriously, I think the comment you read at Korg, was more than likely from someone disgruntled with something or other on THAT day...ask them again in a week and they may have a different view I think.
Dennis