oclHashcat v0.26b

[mastercracker]

I finally got to do a little bit of my own testing and I am getting those values on a single GTX470, single hash:

-1 ?s?d?u?l

?1?1?1?1?1: 12.8M p/s
?1?1?1?1?1?1: 444.9M p/s
?1?1?1?1?1?1?1: 1473.0 M p/s
?1?1?1?1?1?1?1?1: 1472.1 M p/s
?1?1?1?1?1?1?1?1?1: 1472.0 M p/s

Why is there such a gap in the lower ranges (5-7 chars mask)?