reply to SeanFL
Re: from 35/35 to 75/35 and now slow upload? It depends -- maybe -- on which Router you have. I've been struggling with horribly unreliable download and upload speeds since upgrading in November 2012. Three Tech Support calls later, the Tech tonight finally told me I needed the Generation 3 Router, Rev I. I still had Rev F, and nobody ever mentioned it on other pleas for help.
Not sure if this will help you.