Summer residents receive .75 of a point after six weeks of residency. If a summer resident is still on the fall waitlist after gaining the .75, it gives them higher waitlist priority for fall. Part of what makes the co-ops a fabulous place to live is the diversity that exists amongst the different houses. There is a vast range in size and theme among the residences and their members. Meeting the residents and seeing the house is the only way to determine whether or not you'll be happy living there.
Dinner time is generally a good time to visit and talk with current members.
People's living preferences vary substantially, so it is unwise to rely on word of mouth recommendations when you rank your housing choices. Taking the time to visit will pay off and make you a much happier co-op resident.