If you don't have a subscription, or a genuine key and/or legal download, and you can still obtain it, then I would suggest it is a leak, whatever semantics are applied.
Guys it's not a leak when it hits MSDN. At that point it's just a MSDN file. It's a leak when some disgruntled employee copies an internal file to an external network. MSDN is pseudo-public since it's just a paid service. Would someone at a paid cable channel be shocked that people were sharing their videos on the internet? No, that wouldn't be a leak. That's just someone who paid for something, sharing it with strangers.
He showed Enterprise Mode being available as an option in the Tools menu of IE11 - that is not there with the update we got from WZT
I might be wrong with this - but I believe it is a feature that must be enabled in Group Policy. There are GP settings for it to allow users to have some control over enterprise mode, and of course, options to allow enterprise admins to specify a list of sites that should use enterprise mode.