I have been getting a consistent 25-28 mpg average for the last couple tank fulls and a 26.4 average on the trip that is over 3k miles right now. I'd say about 50/50 highway/city driving in my '05 LGT.
I have measured the actual mpg vs the info computer dash gauge and found that my actual is about 1 mpg lower. I really can't see how people can be reporting such low numbers like 16 or even 20, unless you're doing some crazy stop and go for whole tank.
Sometimes I reset the trip while on a long highway cruise and usually come out in the low 30's.