Satuday is a strange day for me, historically its the day I get the lowest traffic, its is however the best day for adsense revenue.
Now I reckon there are so many people using the web at work, on Saturday they have better things to do, so overall web traffic is lower, however those people who don't have internet access at work get a chance to surf, but they are less experienced surfers and as such are less likely to spot an ad versus a normal link, so even though traffic is lower, CTR his higher, anyone else have this experience?

Actually what you are saying is true but I take it in other way round. I take it like there are less returning visitors or registered users of my forums and more of new visitors and new visitors will click on ads more than the people seeing it daily.