Was the exodus from Egypt miraculous in how fast Israel traveled from Goshen to the Red Sea?
Yes. The exodus from Egypt was miraculous in its speed: although the people walked, God must have miraculously moved them along so they could travel from Goshen all the way to the Red Sea in a very short period of time. This supernatural assistance explains the rapid journey.
Les explains that there was something about the exodus out of Egypt that had to be miraculous. The Israelites walked, but God must have somehow or other miraculously moved them along to have been able to go all the way out of Goshen down to the Red Sea in such a very short period of time. He then connects that event to the future flight of Jews in the midpoint of the Tribulation, when they suddenly realize the one they trusted, who signed a treaty three and a half years earlier, is their mortal enemy. They will flee out of Jerusalem, and an earthquake in chapter 11 occurs that same day. Les calls them a mixed remnant, an escaping group.