Maybe the problem here is that Americans accept hspa+ and dc-hspa as 4G and in Europe we don't?
Because (from what I have read) full '4G' is supposed to operate fully over TCP/IP (including voice calls).
Whilst 42Mbps data is damned fast for 3.5G (as Telstra calls it), it still uses traditional methods for voice.
So even if you count DC-HSPA etc as 4G, it isn't FULL 4G.