Yamaha DTXpress/DTXplorer/DTXtreme

Here's a translation of the part of the Japanese report that 
interested me:

"After that, as the enrollment edition without impairing function and 
performance characteristic in 1999 June, cost decrease was 
actualized ' DTXPRESS ' (D tea express), adopted 3 zone pads in 2002 
July ' DTXPRESSII ' to announce, as improvement is repeated, it 
permeated to the market securely. As a result, ' DTXTREME ' of the 
professional use model (D tea extreme) the sum total sale quantity of 
the DTX series which is included became until approximately 55% of 
sale of approximately 38,000 units and corporation drum the whole 
this is occupied 2003 9 end of the month presently."

Can anybody fathom what the point about the DTXtreme is?

Ed