I can actually confirm that: I was getting 26-27 MPG Highway before my engine let go.No need to guess.
Caliber with the 2.4/CVT is rated at 22/27(24) - which puts your numbers right in line.
Caliber with the 2.4/stick is rated at 23/29(25) - really not all that much better overall.
Caliber with the 2.0/CVT is rated at 23/27(24) - really no different than the 2.4L model.
Caliber with the 2.0/stick is rated at 24/32(27) - pretty close to 2G Neon numbers.
'04 Neon with the 2.0/auto is rated at 22/29(25).
'04 Neon with the 2.0/stick is rated at 25/32(28).
Just for grins:
'98 Neon with the 2.0/3auto is rated at 21/30(24).
'98 Neon with the 2.0/stick is rated at 25/37(29).
'98 Breeze with the 2.0/4auto is rated at 20/30(23).
'98 Breeze with the 2.0/stick is rated at 23/33(27).