Changes in adsense. PPC differences. Am I the only one seeing this?

I've noticed that for the last week my adsense PPC has lliterally doubled. I went from maybe 6 bucks a day to 12. What I don't understand is my overall impressions have dropped.

It's almost like there was a point where Google changed and started feeding my sites higher paying ads.

I don't buy links, and my sites are 100% legit. one is a news site and the other is a script I wrote.

What I'm asking is, could this be that Google took my site out of value and put it in a more premium category? Does Google do this?

I am not a pro by any means, i'm just trying to understand this a little better.

 

most of publishers experiencing that but have not experienced any thing like that as yet

 

I've seen my PPC get halved, Grats for you lol.

 

My PPC didn't changed.. may be there are more competitors in your niche..

 

Wow I guess I hard notices turned off for this thread.

It just surprises me is all. It's been a couple weeks now and the numbers are starting to stabilize here. The problem is since I haven't made any real changes I'm a little hesitant to rely on this to continue.

I'm not complaining i'll say that much. But my sites aren't advertising heavy. I mean they're sites that focus on things and have for awhile. I thought I had stuffed too much in the way of ads but if it's going to work I'm not going to touch it.

Thanks for the replies