I think hes just saying that the F-22 has been around for a while and that as amazing as the plane is, the technology has been getting better over the years with the f-22 model.
the yF-23 is a new prototype that will be built
http://www.fas.org/man/dod-101/sys/ac/f-23.htm
http://www.globalsecurity.org/military/systems/aircraft/f-23.htm
