They didn’t say that about collets at all. They said it about collet reducers.
From http://www.precisebits.com/news.htm :
“After years of telling our customers that collet reducers are made by Satan, we decided to see if we could design and build one with the same level of precision and balance as our ER style spring collets. While there are some inherent differences between tapered collets and cylindrical collet reducers, minor tweaks to the inter-leave geometry enabled us to reliably produce reducers with low TIR, uniformly high clamping pressures and virtually perfect balance. Best of all, no Satan.”