I've been gone for a few days, but I want to touch more on my prior post.
I've seen the best results just pitching dry yeast straight, no rehydration. I suppose the difference in strains could be the case? Though in my experience S-04 isn't really like any of the liquid British yeasts I've used. It's like it's fruity in the wrong ways.
I won't even comment on US-05 from a strain perspective, as I don't like 1056/WLP001, and haven't used either in years. They're so clean as to be boring. Good for a pseudo lager, but that is IMO.