Yes. Same thing happened with the CRJ in the past. New hires able to hold a line in a matter of months, people stuck on reserve on the 145 for 4+ years that couldn't bid to the CRJ.

Great for new hires, not good for current pilots stuck on other aircraft.

The 175 will have the most rapid movement for FO's at the company. New airplanes coming in every month and pretty much every current FO on it now is very senior displaced and will be upgrading soon, many will be upgrading on this current vacancy award. So, all the FO's leaving it off the top and current FO's can't bid it = rapid upwards movement for a new hire on the 175. Reserve for a new hire on the 175 will definitely by far be the shortest unless there is another big displacement in the future.