I have "female orgasm" on my Google alerts and saw the same article.
My opinion is good muscular health is good for you, and my personal experience of wearing high heeled shoes is that it is a work out! lol
I think there is a big misunderstanding about the tightening of the pelvic floor muscles and this contributing to better orgasm. There is a whole section in the Common Sensuality Course on retraining your body to relax so you can feel more during the whole sensual encounter. The tightening exercises actually do the opposite, having you feel less and less.