As I suspected, we're arguing over mis-communication brought about by poor phrasing. - End-users' address space determinations are based on 25-50. - ISPs' address space determinations are based on their three-month needs. - Both are judged to have used their existing assignment 'efficiently' if they have used 80% of it.
I guess I can't say it any more clearly than that and I'll say it again that I think some ISP's make it unnecessarily difficult for customers to get additional address space.
As Randy Bush likes to say, I'm glad my competitors make life so difficult for their customers. Come to Global Crossing. You won't have that problem. All customers receive address assignments/allocations sufficient to achieve their goals within the framework of the assignment policies proscribed in RFC 2050 and by the pertinent RIR. /david