Last time, I used simple Fleishmann's Active Dry Yeast, which bubbled up
within minutes of introduction.

This time, all the grocery store had was "Rapid Rise", again by
Fleishmann's.

This stuff seemed to be quite delayed, and while atleast 2 of the vessels
produce alot of bubbles, it's alot slower acting than before. Has anyone
ever worked with bread yeast, or more importantly this particular yeast?