By itself? Probably not. I leave LTE disabled on my Galaxy Nexus to save battery life most of the time. I can't even remember the last time I turned it on. It's nice for tethering I suppose but for normal usage it's not worth the battery cost. If you're on AT&T HSPA+ is actually fairly close to LTE speeds already though the latency is generally higher. I see about 7-8Mbit/sec on Verizon LTE and about 4-5Mbit/sec on AT&T HSPA+ -- not a huge difference.