Hmm, I find "girly" a bit hard to define. My accepting wife likes comfort but can be very feminine when it is appropriate. For the purposes of this post I'll define "girly" as "preferring to wear overtly feminine clothing and makeup"
My feeling is that there is little correlation between girliness and acceptance. Acceptance is more related to the SO's investment in the relationship and I've seen devoted SOs that range from plain to overtly feminine.
You might find a correlation between girliness and participation (actively helping the CDer with clothes and makeup) simply because the "girly" SO possesses the skills to participate in that way.
