Quality of k2s and fboom has plummeted as of late.
I've been a loyal fboom premium user for (on and off) at least 3 years now. Premium speeds have been cut at least in half. Where i used to get 8 megabyte per second with a single connection it now usually sits at around 2 megabyte per second. That's extremely bad for a "cloud hoster".
k2s free speed is always 30kb/s for me. Even with the vipergirls referrer, k2s just seems to ignore it.