I think they obviously don't get the attention they deserve. They are definitely "high end" amps or "boutique" amps, if you use those terms. They have a touch sensitivity that separates them from mass market amps, as well as build, and other things. Ultimately voicing sells amps, IMHO, and word of mouth in the big forums goes a long way. If PRS amps suddenly became a "The Gear Page Darling" as I like to call it, they couldn't build them fast enough.
It's a tough market to crack. Lots of boutique guys have been doing it a while and many are doing it extremely well. Guys looking at the top PRS amps are looking at Bogners and 3rd Power and Red Plate and Bad Cat and (insert another 10 boutique makers here). That's some high cotton. PRS has both the tools and the "ears" to build with those guys. And more resources than most of them. I for one really hope they keep building and growing the amp line! Guys like us discussing them somewhere other than here would go a long way with spreading the word. Saying how great that PRS amp is at The Gear Page whenever you're there sure wouldn't hurt!