I started using the sprouted wheat and barley last year when my cow was VERY late in lactation and it did in fact increase her milk production. She has since gone through her dry period and freshened in April. She is now feeding her calf and has taken on a foster calf and they are all doing great!
To me it just seems a more natural feed than unsprouted grain. You don't have the ph change in the gut like you do with unsprouted either.
So far so good.