Chuck,
Would be interested with the figures you have, me thinks they will be worse than the RJ. Buring more fuel than a 737-300 with half the pax capicity ?
About 70 RJ85 and 50 RJ100s are in service at the moment.
RJ100
AEGEAN AVN 2
CITYFLYER 7
CROSSAIR 14
DAT 9
DELTA AIR TRANSPORT 1
SAM COLOMBIA 9
THY-TURKISH AL 12
RJ85
AZZURA AIR 3
CROSSAIR 4
DAT 14
LUFTHANSA CITYLINE 18
MESABA AL 26
PELITA AIR SERVICE 1
UZBEKISTAN AIRWAYS 3