I just happened to look at the minergain home page comparing Kano and slush.  They are 3EH now but the returns for the week is almost double with Kano - even with a couple longer blocks.  Kano has had 24 blocks since 3/25 and the other had 588.  It is amazing the impact the pool hash makes on the earnings for each block.  So I for one will always Mine On with Kano!