I did the last 25 hours of my CPL in a twin and although it didn't help me get a job initally and probably didn't help me for the first two years of my employment, it DID help when it came time for VFR and IFR Charter as I already had the 5 and 10 HR command requirements.
Later when I moved onto my Instrument rating I already had some time on the aircraft and was reasonably familiar with the systems.
I believed this to be advantagous from the point that everone had told me the workload of the Instrument Rating was high and I didn't want to be 'learning' how to fly a twin whilst 'catching up' with the IFR workload.
My two cents
Cheers,
GA Driver