Not really. I launched at 8pm, got my Kickstarter links to put in my share page, and started putting them into emails to send out to friends and family. An hour later, just before I hit send, I looked at my page and raised 4% of my goal. Within the first 72 hours or so I hit my goal. At that point I would say it was about 70% Kickstarter backers.
Here check out my:
https://www.facebook.com/DefyneDesign# and
https://twitter.com/DefyneDesign page
As you can see I haven't used them much, and didn't start posting very soon before my launch. I think it is all about the audience you are catering too. Magnets seem to be very attractive to Kickstarter users. My backer traffic page looks nothing like Kimiko's "Tabletop Simulator". I dont even know if wooden magnets would appeal to a Reddit audience. I haven't tried and as far as I know no one has tried putting a link of my project on it. I guess it would be an interesting test to put it up and see what would happen, but I dont use Reddit so I am doubtful anyone would pay it any mind.