It may not necessarily be RCU. I had the same problem all last weekend. When I went to 'big' sites that downloaded and uploaded a lot of files (like RCU) it was slow as molasses. If I went to smaller sites (not too many big files), it looked OK.

I'm on Comcast, but it could be any provider. They just had a slowdown in our area last weekend. I don't know what causes it, and of course, they won't admit to it. I'd read something on the Internet that said to keep track of the 'slow' days and make a complaint when you get your bill.

I don't know if the above is relavent in your case, but I thought I'd mention it.

Bob