McDonalds has wifi. But yes, Dylan (or someone else) would have not been able to use the iPod for texting while on the road.
Maybe they didn't go straight home, like we think? I also interpret the latest info as Dylan sent a message, using something other than his phone, at 9:37 p.m. To do that, he had to have some kind of "sending" signal. But yet, LE has not confirmed that Dylan made it to MR's house? So..... maybe they went somewhere else, before they headed home and LE is sitting on that info? Otherwise, why not just confirm that Dylan was there?
I tend to believe that Dylan made it to MR's house because there were clothes left there, the iPod was there and now we have this late message. But.... I'm only speculating and I realize that Dylan might not have ever made it there

Very strange, imo.
Salem