If it was just bad choices and bad playcalling made by Zorn, then I'd say yes. Right now this organization has a multitude of problems and many of them don't revolve around the coach. Firing the coach won't solve any of them at least this season.
Also, if Zorn is fired who would become the head coach? Danny Smith? Jerry Gray? Joe Bugel? Does anybody think that having Sherm Lewis (who hasn't coached since 2004) take over the playcalling will radically make this team better?
Also, one has to consider this. What if the Skins turn it around with the interim coach? Then what is Snyder to do? Fire a guy who was winning to bring in the big name or keep the assistant who has been coaching very average to mediocre teams but is on a winning streak?
Best bet is to stick with Zorn and let this year play out as we hope to rebuild with a new coach in 2010.