Gas prices recently (roughly) tripled, and it didn’t deter them from buying, or driving them.
Are you sure it didn't deter sales or driving? I don't have the numbers, but I suspect if we found them we would see that the average vehicle purchased used less gas and that sales of gasoline were lower than typical.
Not in my experience, no. The newer trucks have very distinctive grills, and I've seen more and more of them over the past year.