Have sound off due to it being late so couldnt see anything more then some guy standing there....
But yes, wimax is more spectral efficient by a small margin over LTE, and 2x more efficient the HSPA+
The limitation in speed has to do with how its deployed..so lets use the numbers shown in that video...
Quote:
WiMax Spectral Efficiency= DL 6.4 bits/hz UL 2.8 bits/hz
LTE Spectral Efficiency= DL 5 bits/hz UL 2.5 bits/hz
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Sprint uses 10mhz right now for wimax...6.4bits * 10mhz = 64mbit
Verizon uses 20mhz right now for LTE...5bit * 20mhz = 100mbit
Then take into account other users, interference and etc...and spec limitations...
So verizon has a better frequency for less interference and more spectrum dedicated to LTE..
If sprint upgraded to wimax-enchanced they would have even better spectrum efficiency..with a minor upgrade around 40% more efficiency..with major upgrade 60% more efficiency.
So with a minor upgrade to wimax-enchanced we would get 25mbit/sec download and 4.5mbit/sec upload on the same 10mhz of spectrum per user!
Edit: oops by habit i put wimax 2..I meant wimax-enchanced! wimax-enchanced is currently available in the market and its a minor upgrade to wimax..similar to how you have HSPA+ 14mbit and HSPA+ 21mbit...