No operational PRTs eh?

The anti-PRT movement keep going on about "If PRT is such a good idea, why aren't there any?". To which those of us in the know respond, "Oh - but there are." There are 3 (WVU; Heathrow; Masdar City). And soon there will be 4. India is buying a PRT network from UltraPRT to be installed in Amritsar by 2014. Oh yeah, plus another in Suncheon (Korea), which will be ready in 2013.