Yep. A slide or graphic until five seconds before the start, fade black, count five, and fade up on the Pres. Cue him.
Unfortunately, the control room is in the hands of whoever's providing the pool feed, and apparently they chose to put it on the line early. Most of the nets were apparently staffed with people who were savvy enough not to punch it up until the appointed time. This being the kind of thing that happens regularly with remote feeds, it's hard to conceive of anyone who saw the feed come up early punching it up because they didn't recognize there was a problem.
Half agenda, half incompetence if you ask me....
Freepmail incoming....