Just to add my two cents, (I'm a currently in a sorority at Alabama and in the Honors college, but will keep my affiliation secret for now
) I would say that there is a decent number of sorority women in the honors college. (All of my honors courses have been overwhelmingly greek, actually) Due to the GPA requirements to be competitive during rush, I actually found quite a few other women in the honors college when I was going through recruitment.
Also, preview this year severely limited the number of sorority women that could be in the house or working the different information tables and events, so it doesn't surprise me that your daughter didn't meet any sorority women who were also in the honors college, seeing as this week is a huge test week and they were probably studying, since they weren't needed in the house.
Hope that helps and I look forward to meeting her in the fall (whoever she might be
)