In July everybody was an 'introvert', no no you can't be a bit shy or socially awkward you have to be interesting with a label.
Normal MNer "I don't really want to go to this school/work/long lost family function as I'm a bit shy, and actually can't be pestered with talking to people all night".
'Introvert' MNer "OMG I've been invited to a function which is like the worst thing evah for me as I'm an introvert you see and I can't do it, I just can't".
Disclaimer: most people probably do err on the introvert side of the coin, I think there must have been a popular thread linking to Myers-Briggs or something around that time. 