[css3-text] text-transform: uppercase; and cpsp OpenType Feature

One of the issues marked in the latest draft of CSS3 Text is whether the
cpsp OpenType feature should be turned on for combinations of
   text-transform: uppercase; letter-spacing: normal;

This does seem to be the recommendation in the OpenType spec:
   http://www.microsoft.com/typography/otspec/features_ae.htm#cpsp

Thoughts?

~fantasai