Codpiece, article doesn't say that you must skip stretching all together. They're rather suggesting different stretching techniques.
So next time you're at the pool, try their suggestions (I would imagine swimming dynamic stretches would be different to those described in the article, but I'm sure it will be easy enough to find them online) instead of traditional stretches.
Their view, which I also agree with, is to warm body up before exercise, rather than stretch it.