Is this true?? They are going from 12F to 9F on the 175's?
I sure hope this isn't the case.
No. The EMB-175s (76 seaters) are staying at 12F/64Y.
The EMB-170s are new additions to Delta Connection flying. These came from Frontier/Midwest and as such are in an all-coach configuration. These planes, being smaller by about 6 feet, are going to ultimately have a 9F/60Y configuration. This is actually an improvement from the last time Delta had EMB-170s in the fleet, when they were in a 6F/64Y configuration.