There are some right on comments here but IMHO if a person wants to be StreetWise they would not carry ANY plastic hoster on the street. I have seen too many fail. While they may present quicker and cleaner than leather, the compromise is not wort the risk.
Not Plastic, they like to call it 'Polymer'. A more trendy name.
I agree but let's take it even further. What about plastic guns? There's a bunch of them out there and a lot of people love them but lets face it. When my life's on the line there's no substitute for a real quality chunk of metal. And real guns deserve a real leather holster. I still cringe when I see a nice 1911 or a P226 crunched into some black hollow shell for it's home.
Tupperware guns? Now they do deserve to be rubbing around with their PVC counterpart made holsters.