After doing a little cyphering with the BTS data for the 1st half of this year - I even took my shoes off so I could use my toes to count - here's some comparitive data....
On the "low cost" side of the ledger, the West side is doing pretty well on food/beverage costs - only spending about 50% more than WN and the same as B6. The East side isn't doing so well in the "low cost" arena, spending 5X what WN spends and about 2.5X what B6 and West spend (I guess the Envoy service is relatively expensive or East FF's dring more booze

).
On the "full service" side, comparing to legacy carriers first, there's a fairly large difference. NW, DL, and CO spend between 4.5 and 5X what West spends on food/beverage per RPM, and spend almost 2X what East spends. UA & AA are in a class by themselves, spending nearly 6X what West spends and nearly 2.5X what East spends.
It could certainly be argued that the other legacy's extensive international operations add to their food/beverage bill relative to East & West, so how about the other "hybrid" non-legacies that don't have those extensive international ops - Spirit, Airtran, and Frontier? West spends less per RPM than any by a slight amount. East, on the other, spends more than those 3 - double the amount.
So I guess the question is, are we going to see the West definition of "full service" in the future? Or current East? Or true legacy standards?
Jim