Looking at vehicle total sales figures is a very bad way to determine what families drive. Those numbers you cite include corporate fleet sales, which heavily skew domestic truck sales figures. Nor are all of those trucks in a crew-cab configuration.
But yes, even many mid-size cars and SUVs are difficult to fit three seats in.
> we assess a vehicle’s ability to securely and easily accommodate three child restraints in the second row. Our test results have shown that unless you’re driving a full-sized crew-cab pickup truck or an Audi Q7, the installation is going to be difficult, if it's even possible.
(It is kind of funny that your source shows a picture of a single cab 97-03 F150 in regards to fitting child seats three across... :D )
But yes, even many mid-size cars and SUVs are difficult to fit three seats in.
https://www.consumerreports.org/car-seats/how-to-fit-child-c...
> we assess a vehicle’s ability to securely and easily accommodate three child restraints in the second row. Our test results have shown that unless you’re driving a full-sized crew-cab pickup truck or an Audi Q7, the installation is going to be difficult, if it's even possible.
(It is kind of funny that your source shows a picture of a single cab 97-03 F150 in regards to fitting child seats three across... :D )