Hell yes, for me it was when I was playing 50NL at stars and was going to move to 100 at 3K. I just bounced back and forth between 2.5 - 3 K for months.

I think it was largley for the reasons you mentioned, subconsciously loosening up etc.

I am now bonus whoring round the sites and the smaller goals - load $600 and try to leave with ~1000 seems to work better for me. I'm not even sure how much is lying in my Neteller, it will probably activate the doomswitch if I look!

Of course this means that I now just play 25NL and cheap S&G's, but i'm just a hobbiest and this suits fine; and you can still buy a PS3 with the earnings now and then.