It looks like the procedures have changed a bit at Hedy Fry’s campaign office, as I got a short reply in just slightly over 24 hours. This is the response I got regarding the changes to the census.

It’s not much:

Dear Mr. C________,

Thank you for your e-mail regarding the long census form. Dr. Fry appreciates your concerns in this matter. I will bring your letter to her attention.

Kind Regards,

Office of the Hon. Dr. Hedy Fry, P.C.
Member of Parliament for Vancouver Centre

But it’s something. I didn’t get a letter like this from my past e-mails, though I always have (eventually) received a response.  I will update if/when I hear back from the MP herself, and will post details of my previous correspondence as I find time to do so.