The timeline is spelled out. BF reports done deal early last night. Some 8-9 hours later, Adam Schefter tweets that plans are being made (present tense) for a Baltimore visit.
What's more likely?
a.) A homer Bills fan page gets the scoop that Jeremy Maclin has agreed to terms and is flying in to sign here. However, even though he has agreed, Adam Schefter can't get that information - but Bills Fanatics can. Furthermore - he's setting up a Baltimore visit even though he's agreed.
or
b.) A homer fan page sees a whole lot of smoke, here's about the visit, and jumps the gun proclaiming a done deal off of questionable information and excitement.