The thing that I can't get over is that in certain markets, Sprint can't even reach an agreement with Centurylink to get fiber access (but there were no problems with AT&T or Comcast??). All the sites that were originally slated for Centurylink fiber got switched to microwave backhaul instead. It's a different story in different areas, but that struck me as funny.
Also, from what I've seen throughout the Midwest and on the East Coast, Verizon doesn't use very much microwave. Clearwire is the by far the biggest proponent, AT&T uses their fair share, Verizon uses some, Sprint seldom uses microwave, and T-Mobile just uses whatever crappy backhaul is most readily available.