i dont think that europe is more open to "clasic" rock stuff than the usa
good example for it are KWS and Jonny lang. I searched for records of those two guys in every possible shop in israel, and my dad searched for them in europe (prague and germany)
and we werent able to find them
luckily by the end i found jonny lang's album in some shop here around, but the point is, that even SRV was a major star in the usa, while almost unknown in europe