I think this thread should serve as an example of jumping to conclusions and wanting to jump on the statins are bad bandwagon.
I went out and rode 42 miles yesterday and had no issues with how my muscles felt. Just like the previous ride I described in the post above. This route had some of the longer distances of continuous climbing that one can get around here and since the upcoming charity ride a little over a week away is coming up, I now am relieved that I don't have to worry about running out of steam. Though this ride is only a 63 mile ride, it starts out and doubles back on much of the 42 mile ride I just did.
I just guessing that as to my experiences related in the OP, that those four rides were just my body getting use to the new med. Or a minor cold or virus going through me at the time.