I'm sure it's not.
I don't know what people's fascination about "outing" leakers. The source is risking thier employment by telling us some things. This is not to be taken lightly. If you knew for an absolute fact that it was the source, then why even bring it up? Look the other way like it was Batman's identity. Not trying to single you out, and I know it's just good banter and in fun, but to keep getting information, we have to protect them.
And Stephen has several people who give him info, not just one.
The hide tags are next to the php tags in the post box.