Extreme slow update

I'm currently downloading the 4/6 update and its taking forever. I'm wired into my fios modem and i get about 150 mb/s, but the damn update is going at like 1 MB ever couple of seconds...

Have you tried restarting your modem? Sorry if I'm stating the obvious, but I can't think of anything else.

What speeds you pay for compared to the speeds you are actually getting are two different things. Have you tried doing some speed tests online? Run some online - start with servers near you, then try ones further away- and see if you are getting what you're paying for. If for the most part you are, then there isn't much you can do. Downloading on Xbox 360 or Xbox One typically is much slower than directly downloading a file off your computer.