noticed the same thing for just the past couple days. today it's really hard to access for me. Even the site itself isn't loading right now.
The night is also slow for me too, obviously something to do with server loads. Bit of a pain but what can you do.
Alexa always takes ages for me to load as well. Many times it doesn't load and I have to come back later. I have heard from a few friends that this happens to them too so I guess it's pretty normal.