What speeds were you getting on WiMax? My GF with her TBolt with Verizon is getting ~23Mb/s downloads and the best I have seen in a 4G area on Sprint is ~1.4Mb/s download speed. Mind you that was back in like October or something but that is still a SIZABLE difference in speeds.
I've gotten around 8.2MB/s in my area on a normal day...LTE is a lot faster than WiMax in most cases