Nope! The cymbals are going to be hot. They are made out of a similar metal that some Meinl's are made out of which is B12 bronze. I mean...they we're made in conjuction with former Meinl artist, Marco Minneman, who is a beast in his own right (just for the record). B12 is more musical than B8 metal, but not as expensive as the B20. Also, the fact that it is sheet and not cast has nothing to do with sound. For example, Paiste Signatures are some of the best sounding cymbals money can buy. But guess what? Those are sheet, not cast. ZHT's , if marketed right, will be a smash hit. The price point is right there with the XS-20's ($300 or so).
Peep the line-up:
20" Med. Ride
20" Rock Ride
20" Flat Ride (unheard of in this price range)
18" Crash Ride
8" and 10" splash
14",16", and 18" Fast Crash (unheard of in this range)
16" and 18" Medium-Thin Crash
16" and 18" Rock Crash
13" and 14" Hats
14" Mastersound hats (unheard of in this price range)
14" Rock hats
8" and 10" Mini-Hats (unheard of in this price range)
16" and 18" China
16" and 18" EFX (very different!)
They have more of a selction than anything in this price range. When they hit a store near you, go try them next to an XS-20, a ZXT, and something like a Zildjian A so that you can educate your ears. You can read this 100,000 times, but you won't know the difference until you hear them. Keep drumming! Yell back!