Okay ... let's add the fact that one bike is a BMX and the other is ridden by a 4'11" girl that weighs 145 pounds. For me, that means they are riding slower than the average cyclist.
Additionally, there are 8 minutes between the time on the video camera (12:19) and the time that the cyclist called his daughter from the washroom (12:27), but the cyclist estimated that he saw bikes at 12:20. That makes 1 minute between the video time and the cyclist time.
I absolutely agree with your second point. Not even Lance Armstrong could pull off that feat.
Your first point, though, troubles me. I used to do the rolling rest/first aid station for bicycle club rides. My father was the unofficial rolling doc for RAGBRAI when it was just Karras and Kaul with a few thousand of their closest friends. I know a little about planning bicycle rides and how fast just average people can ride a bicycle.
The average speed for a reasonably fit bicyclist is 15 mph for planning purposes. By reasonably fit, I do not mean Olympic calibre or even All State level. I mean ordinary people, even people who could be described as pudgy. That included kids as young as 8 years old and adults in their 70s. Those average people could hit 30 mph over a quarter mile sprint.
A mile and a half on a bicycle is still within sprint distance (the distance during which anaerobic effort can be sustained). Doing 1.5 miles in about 8 minutes would be doing it at ordinary cruising speed.
Sure, the kids would have to be motivated instead of lollygagging along admiring whatever caught their attention. But two girls who thought they could pull one over on Grandma by riding down to the lake and back without Grandma noticing? I think they'd be pedalling their hearts out.
What I really wish I could do is contact TG and ask him what sort of cell phone he has, compare it to US Cellular time (because that's the known time according to Mr P) and ask him if he has adjusted the time on his cell phone in any way in the last month.
Not wanting to be perceived as a stalker, I'm not going to do it. If someone does it, it should be someone who has a pre-existing relationship with the gentleman and who fully discloses what is planned for the information.
If there isn't anyone like that reading this thread, my curiosity will have to go unsated. I've been through a lot worse in my life, I'm sure I'll get through that possibility as well.