The +1 will be a vanity button for larger sites while other sites try to game it by having friends, families, and fake ids push the button.
nope ! not yet started but i think the response of others site is good so i am thinking of adding the button
I think that right now there is no changes because they are testing. we will have to wait to see if it is going to be any factor.
I haven't started using it but i am thinking to do so. It seems that there are even many people who are looking for this kind of services