Interesting...
I could hardly even get onto Yahoo at all . It took about 3 min just to load the main page. Every other site seems to work OK.
I tried to download an attachment from my Yahoo mail. It downloaded at a whopping 576bytes per second (yes, bytes).
Other days, I will check one account and it will be super quick, and my other account is sloooowww. Weird, must be on different servers.