Models: How many is too many?

Zach … this is very useful. A related question - we have a client detail page where the account ID is in the URL. We have an Account model that returns a few fields from that account, then about a dozen “related list” models that use that parameter as their account filter (“Client__c = (param) id”). For the related list models, is there a performance difference between filtering on the URL parameter or filtering on the result of the Account model?