Anecdotally that appears to be correct. My company tried to sponsor a graphic designer to come up from the States. We were denied because the gov't said there were more than enough skilled graphic designers available.
To be fair though, there really are enough skilled graphic designers around - especially in the cities.
Software developers on the other hand...
Completely agree with you. It's a good time to be a software developer! :D
Obviously depends on the market, but... in Vancouver for example, median wages are simply not competitive when compared to what's available 3 hours south of the border.