Thanks for that info!
I did see that picture before posting and the kid in the back middle isn't in a booster so it's still a mystery! She also didn't say one way or the other if that configuration, with three convertible car seats in the center row, impeded the use of Easy Tilt - which is actually our main requirement for a vehicle. So if we can't reliably use that feature we won't buy. It is now recommended that children should be in boosters (preferably the high back kind) until at least 10, probably older. And they keep inching up all these recommendations every year, which is why it is obnoxious so many car companies haven't caught up with that changing reality. Wherever a child passenger could be seated a car/seat booster of some kind should fit/be accommodated.
The Pacifica is decent on this issue and there are other perks to consider, but they not the best. Safety first and all that. ;-)