i agree with a few people... i think the toyota has the premium priced van pretty well covered due to the offering of awd... GC has the low priced vans owned due to nothing being close in price. the stuff in the middle is just for people who really like one part of what they have to offer (honda's reliability track record, nissan interior, etc.)
as for wards... i agree they are not something to be relied upon, but they do mean something. if it was on one year and off the next, it just means something knocked it off that year. and though it's the same engine, there are minor changes every year that might just put it back up there on their top ten. (valve timing, mds, skyactiv)
as for mix's comments about the GC... sure it "caught up" to the other engines.. i agree it didn't totally surpass the others... but this van is 55% of the cost of the cheapest other ones!!! you can't get better engines, better fuel economy, more comfortable seats, and stowing seats for close to half the price... if they could, no other company would need to bother building a van.