The ICT study I mentioned was further detailed by Tech Central Station on Tuesday, and the author does a little analysis to figure out whether it was biased. His conclusion: yes, it was slightly biased, in favor of Palestinians by rating all unknowns as "non-combatants".
TCS article
Bias check: TCS are a bunch of war-mongering geeks and the guy even indulges in slanting the numbers a certain way mid-article. But the numbers themselves stand up so far... because even when stated by biased people, facts are facts.