Where I'm from (South Africa) the "What is 4G" question is a hot topic as it is affecting how operators may or may not advertise their networks.
Because of this we actually have an official statement from the ITU which basically states that while they don't necessarily endorse the use of 4G for non IMT-Advanced networks, they acknowledge that networks are going to do (and have done) so.
I also have the GSMA on record saying that they think that LTE will be considered 4G, even though it technically isn't.
Anyway, saying that the ITU "now defines 4G as any cellular Internet network that's faster than what was considered the fastest technology in 2009" is needlessly inaccurate. If anyone in the US would just pick up the phone and call the ITU for clarification on the statement released in December this misunderstanding need not be perpetuated.