I believe that they are, since they seem to share so much in common with the BLS and LCR (both of which are made in the USA). I'll know for sure soon, though, as I plan to order a pair.
Would dipoles make much difference for rear surrounds ?
I can tell you that when I changed from dipole to direct radiating for side surrounds, I found that I preferred the dipole. I think that the Dolby and THX prefer direct radiating for rear surrounds, however (which these can also do, it seems).