you can't really say the strength of a greek system is based on average chapter size... i'm sorry but we have sororities at South Carolina with 300+ girls and the majority of them don't even know each other because there are too many.
I would rather be apart of a bigger GLO, but i'd say after 150 or so theres just no fraternal bond, who knows maybe the chapters with 10-40 guys are really close.
I think its something you just have to judge for yourself... Socials, Community Service, GPA's, Campus Involvement, i think all represent "strength" more so, then simply how many people signed up to slap letters on their chest
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