With upload speed vastly better than ADSL2+ and lower latency than 3G is it really that surprising?
"Two in three say they are using the mobile internet over 4G for at least an hour a day, while 23 percent say they are online via their 4G mobile devices more than three hours a day.
“4G users are intuitively taking advantage of increased upload speeds. We predict data volumes over social media sites will increase tenfold by 2015,” added Karonis.
Over one in three say they download apps, use GPS services and access social media more with 4G than 3G, possibly because 4G users are, on average, five years younger than 3G users."