Article at Huffington Post, but
"online dating" is a broad concept to define a large group of different proposals.
Facebook Graph Search is useless for serious dating.
With Facebook Graph Search you can search for the person you want, but most probably that person does not exist or does not want to meet you because you are not compatible with him/her. Online dating needs innovations, but the innovations will come from Latest Research in Theories of Romantic Relationships Development with commitment: high precision personality similarity and not meet other persons with similar interests.
Please remember If man A likes playing cards and woman B also likes
playing cards, that does not mean man A likes woman B, or woman B can
like man A with the same intensity or interest.