I usually have problems with it between 12pm and 1pm and then between 2pm and 4pm. Those seem to be the busiest times. I don't know about night time because I'm not on here then.
The Webmaster is working on it. They have identified the problem and are working on the solution. Just keep telling you self that your mother was right. Patience is a virtue.
Time of the day doesn't seem to make a difference for me. I am getting it on almost thread/post, even when signing on. I hope previous poster is right that they are trying to fix it.