IGPs in use

["Andre' Zehl" <zehl () berkom de>]

Is there an overview on what the dominantly used interior routing protocols are percentagewise in large AS backbones 
(IBGP, OSPF, IGRP, EIGRP, IS-IS, any?). I don't want to start religous wars on what's the best protocol, I'm rather 
interested if there is an overview available on the facts of protocols used. Is there an "objective" 
(vendor-independent) feature-based overview on the compared advantages/disadvantages (especially regarding 
redistribution) of the various protocols that goes with those numbers?

Andre' 

zehl () berkom de