Nah, vinyl's not that hard. A little different but easy to get used to. Besides, with vinyl you can get much better detail and no two part seams to deal with.
He did say it "looked like vinyl to me", so it may not be maybe?
Well, I just got the Iron Man kit, and it's definitely styrene. There's ONE small tree of vinyl parts with the hands and a couple of other things. But 95% of the kit is plastic.
maybe the non-armored figures are vinyl?
Vinyl is a type of plastic. Its not like the kits are described as being bronze, stone, porcelain, etc.
Dragon also uses their own gluable type of vinyl called Dragonstyrene or DS. It is interesting stuff. I think they used to to mold the complicated superstructure towers on their 1/700 USS Arizona battleship, along with some 1/35 figures and tank tracks.
I don't know if its mis-leading really. HLJ uses standard, generic, categories for their kits. and it is "injection molded" and "plastic". The more detailed description clearly says it looks like vinyl. Either way, its not a big deal. Again this is probably that funky Dragonstyrene DS plastic they have been using in some of their other kits. It really is odd but you can glue it with normal model cement.