Well, if you want to go another step deeper into this you could always get a microscope and count yeast cells, then your slurry amount doesn't really matter, only your cell count. Found an interesting blog on the subject at: http://eurekabrewing.wordpress.com/2012 ... ast-cells/ Also if you...

This is Wyeast's answer: https://www.wyeastlab.com/com-yeast-harvest.cfm I like the % picture they have on there (explanation of cell count above the picture)