I for one would be very interested to see ASICS tested on Terracoin. It would drive the difficulty up like crazy (but thats inevitable) but because of the 2 minute block interval the Difficulty would settle again after a MUCH MUCH shorter time then Bitcoin.
Why not?
It would be interesting to see if the ASIC miners would work on TRC mining. But in the end why would you use an ASIC to mine TRC instead of on BTC's and make money?