I have just applied 4 a travel document, and although I mentioned that i'd only stayed 10 days in Canada-landed Jul 2010- they asked for a paper from the immigration departent where I live showing where I been since I landed in Canada.
If you landed July 2010, you have only been a PR for less than 2 years so it is still possible for you to meet the residency requirements. For your first 5 years as a PR, they look at if you can still meet the requirements in that period, not if you already have. If you waited 2 more years and then applied for a travel document to go back with only 10 days spent in Canada, it would not be so easy to get.