Checkster,
There is actually a bit of smoke and mirrors if you included PICUS. I'm sure it is unintentional on your part, but PICUS does only count towards the ATPL if it is done on a Canadian Commercial Licence flying for a Canadian airline. The CARS has a statement that states something to the effect "any licence, permit etc....refers to a Canadian Licence." That would mean that if you did PICUS on an FAA or any other licence, it does not meet the requirements.
Personally, I don't see why they shouldn't allow it if it as an approved program in the country you were flying in. If you fly a Cessna 150 enough, you can qualify for all the PIC you need for an ATPL as long as at some point in the last year you have done a Multi IFR flight test.
Just curious, were you short of PIC? Is that why you needed PICUS?
My personal view is that time on a Transport Category Jet, should count more than time on a C-150 yet right seat time on a jet counts for half of what the credit is for going around in circles in a little airplane. Left seat time in a jet gets the same credit as time in a C-150.
Thanks,
Jurassic