what are the real sorority rankings here?

Top: AGD, APhi

Middle: Tri Sig

Bottom: AOPi

Phi Sig has yet to be ranked because it is so new

In my observance, I have noticed:

Alpha phi seems ambitious, and the most popular overall because the girls are friendly and relatively easy to talk to.

AOII is very accepting, quirky, and secretly the life of the party.

AGD seems sweet, with girls who deeply value grades and their philanthropy.

Tri Sig membership requires a fake tan and either mob-wife black hair or bleach blonde- no in between accepted. However the girls do seem very close, which may be due to hazing since that is why they can't have formats anymore according to campus rumor.

Phi Sig is new, but from the girls I have met they don't have a set type. They are quirky like AOII however some girls more so than others. There doesn't appear to be a ton of unity as of yet, but I'm sure with time deeper sisterly bonds will form.

If you rank by how strong they are nationally:

APhi - big on the West Coast, big 12, and Northeast, making inroads into the South, nationally the strongest
AOPi- good in the South and big 12, some good West Coast chapters
AGD- good in the Northeast, South and Midwest
Sigma - not that well known except for the Northeast, a few good southern chapters
Phi Sig - not that well known except for the Northeast, a few good chapters

RANKING FOR 2015:

Alpha Phi / Phi Sig
Tri Sig / AGD
AOII

Alpha Phi is hot, rich, and a little stereotypical. They aren't known for being really close as sisters, but are very involved in their philanthropy. They've got a rep for being stuck up in that they don't mix with the frats much but they prefer to mix with sports teams, and a little stuck up in that they think they're the best.

Phi Sig is newer to campus, but they've already got a reputation for hotness and are willing to mix with fraternities regularly. They are girls who are ready for a fun time. They are still trying to get a strong philanthropy event going, but haven't executed a hugely successful or capstone type event in their 2 years on campus.

Tri Sig has a big ego. Last bid day they had a sign that read, verbatim, "Sigmas are the hottest." They are known for their love of partying, even venturing up to Penn State to do so. Their Run for Robbie 5K was hugely successful last year, and therefore are becoming stronger philanthropically. They're known for being a little stuck up since they also don't mix with frats, and prefer sports teams. The mob wife hair and fake tan thing someone else wrote also appears to be a fact.

AGD is a middle/high tier sorority. They are kind of quirky and really care about their GPA, like, a lot. They get really, really wasted at their events. They have a mix of totally amazing girls and girls whose personalities are too big to accommodate a not dramatic lifestyle.
... AOII next