I know Verizon FIOS claims to have the fastest internet speeds and I have to admit it may not be faster but it does appear to be more reliable than Comcast. With Comcast I would have to reset my router several times a day and I had to replace the router at least 3 times in two years. So far I have had to reset the router 3 times total up to this point.
I don't find the internet to be any faster than Comcast but just a little more reliable.