The 756 has been going junior in almost all the classes because new hires on the 737 are forecasted be off reserve considerably quicker. In Newark the 73 guys that are in training now won't sit on reserve much longer than 2 months. The Houston guys will be between 2 and 4. The 756 spots are all Newark from what I've seen and are forecasted to be on reserve for near a year.
Otto is right, besides the lifestyle on reserve, the 756 in Newark is generally considered the best flying CAL does.