About three weeks ago, Google added parameter handling to Google Webmaster Tools. It basically gave webmasters another tool to help communicate to Google any duplicate content or URL issues.
When he goes to the parameter handling page, he gets this message:
Parameters for this site can not be adjusted at this time.
He believes it might have to do with his site being fully in HTTPS and/or not being fully crawled yet. I think it might have to do with the HTTPS thing, which is weird.
Google has not yet replied to the thread, but I do expect a response soon.
Update: Google confirmed in the thread that this feature is not available for https URLs.