just got back home and checked what the morning CPU mining did... total of 7 shares found, dificulty 1 ( max of 1.1MHash/sec when firefox is closed etc ) and find the following block is calculated ( and time showing last 2 of them were at end of round )

17791    2013-05-01 20:01:25  5:00:24 36782329  7 0.00000000    234096   25.58139100

normaly i'd shrug it off due to the over 36 million shares, this time i know at least 2 shares were in the last few min of the round