Keep those rates up!

We've been focusing a lot on stroke rates in practice.  The coaches have recommended that I keep my stroke rates around 1.15 seconds per full stroke cycle (two strokes).  Today's set was short but brutal:

2 x everything below

6 x 25y on :30 at 100 pace 
6 x 50y on :45 easy 

75y on :45 All out 100 pace
25y on :45 easy
50y on :45 All out 100 pace 
4 x 25y on :30 all out 100 pace 

then
300 easy
 

I was a :38 on the 75y and a :26 on the 50y with some 12's and 13's for the 25y part.  My only real success was that I held decent stroke rates.  I was swimming head to head with the best 100 backstroker on U of M's team.  For the most part I held my own but honestly, I was getting KILLED on the underwaters.  I still have a long way to go till I would consider myself good at underwater kicking.