Now that EHarmony has been around for awhile, do their relationships do any better than traditional ones?

Has anyone done any studies, particularly of couples who met through EHarmony and married? Are arranged marriages more or less successful than those of people who meet more randomly?

Related posts:

1. Feel The Harmony With Eharmony
2. eHarmony
3. eHarmony Coupons for 2010
4. Relationships and Busy Lives – How to Make it Work
5. Success on eHarmony – Is it Possible?