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eHarmony is not scientific, it is Snake Oil.
You can't even search on eHarmony, only look at what they search for you. For all I know they just throw me every profile in the area and let the other steps like the can't stands/must haves, and other crap be the weed out factor.
Where is the data and research behind the construct he is using? I can make the same thing, it is most likely nothing more than a multiple discriminant analysis with 29 variables. If you believe that eHarmony has a valid and reliable construct to match couples, I have a bridge in MN you might be interested in.
I tried eHarmony and got a book in the mail from that creepy old guy. It is all anecdotes.