That's a really good question. I haven't thought about it in exactly those terms.
It is very difficult to draw a connection between an online activity with people in one area and a commemorative activity in another. I don't have any evidence or analysis that I can draw on for this, but on the Facebook posts I have seen people talking about how they are planning to go out to ceremonies for key anniversaries in the lead-up to November 11. Having them talking about it online, seeing it, making it visible to them every time they go on Facebook helps them remember.
We do know from estimates that have been done by the CBC as well as veterans organizations that participation at Remembrance Day ceremonies across the country has increased dramatically from the early nineties to today. This predates the work we have on Facebook and other social media. The CBC tracks this because they want to know both the in-person attendance here in Ottawa as well as the television viewership. They found that between 1993 and 2003-04, both the in-person attendance and television audience had tripled. I think many factors contribute to that, but one of the key ones, of course, would be that remembrance is not just about things that happened long ago. People recognize more and more that it is what Canadians are doing today in places such as Afghanistan.