Jill was replying to piskie, who she quoted. You see, piskie has made something of a sport of disagreeing with Jill, probably just to be contrary. So the statement Jill quoted was a bit funny.
As far as splitting Link Pop, the park by itself is not going to take any link popularity away from the current site. Its links point to it. Where we talk about splitting link pop it's because some links point to one domain name and some point to another. So if they were all pointed to a single location you might have more concentration to that single location, but otherwise one doesn't actually take away link pop from the other.
Eventually the engines will normailly merge the two domains together all on their own, thus giving you a bit of a boost as link popularity is merged. But if you have a .com that's already ranking it shouldn't have any negative effect on that front by parking a .ca on top of it to start getting geo targeted traffic.
ahhhh said the blind man
I lost my 'status' as canadian which dropped my traffic considerably so I'm doing the old 'park the .ca' to establish canadian-ness. Does it matter what I get to point to the .ca to get it spidered? I Have a PR4 site that is a CDN directory of sites (most sites linking to it are canadian) but that domain is also classified as non-canadian for the same reason my current site is (which in both cases was not-intential but happened because I used a privatedns.org company to hide my domain ownership (thinking i would cut down on spam, not hurt my rankings by not getting any traffic from canadians).
Is the point of linking sites to the .ca just to get google to spider it or do i have to make sure the sites linking to it are also canadian?