i think the demographic is also pretty different for PT. most PT MBA students aren't looking for the same type of jobs that FT people are looking for. Many PT and EMBA's are looking for jobs more in the VP level, etc.
also, back in the day when most PT people were sponsored, they weren't allowed to look for other jobs and they weren't allowed to leave for X years in exchange for the company paying for their MBA. so recruiting didn't really make as much sense.
i think this is getting better at most schools though. all of the top schools like kellogg, anderson, haas, wharton, etc. have fairly decent job placement programs for PT and EMBA folks.
My Wharton Blog - http://www.whartonblog.com
Wharton MBA for Executives Ambassador - http://gmatclub.com/forum/128-t66295
My Story - http://gmatclub.com/forum/102-t49770