Oh didn't now that.
So lets do the math again.

634$ for a single with shipping. 1/800 of 634$ is 0,7925$ a share value in real equipment.
A ASIC single is  1333$ with shipping 1333$/0.7925$ = 1682 shares for each ASIC single.
40000 mh/s / 1682 shares = 23.78 mh/s/share

We don't now the power consumption for the ASIC so for now it seems a good deal.