Ike, That's what I had always heard and read too, so I never considered not rehydrating.
Maine, I too k a look at my US05 and the pack says sprinkle like you said. I never read it before. They have changed the look and text of their website data sheets...they used to have different tech sheets for home, craft, industrial and they only said sprinkle for homebrewers. They all now say rehydrate or sprinkle. I emailed them a couple times way back when for clarification but I guess they don't care for the homebrew market. Zero response.