yes, you're right about twitter. However, we don't have that much of a problem with people hitting the social login button as much as with people forgetting that they used social last time they logged in.

They then try to enter email and password. When it rejects them, they try to reset the password, and get frustrated that the reset password does not work...

We relatively regularly answer support emails and just tell users "It looks like you used your google account to sign in last time, just hit the right button and you'll get in instantly"