Using data from statisticbrain.com, ConvergEx found that the average courtship time for “off-line,” traditional dating prior to marriage extended to 42 months, which is two years longer than the 18.5-month, average dating-to-marriage cycle for people who meet online.
Aside from saving time, online dating seems to save money. Working with a conservative estimate of one dinner date at a cost of $130 per date – $100 for a meal and drinks at a nice restaurant, plus $30 for two movie tickets and popcorn – the protracted dating can amount to a whopping $23,660, and that's without any additional gift, never mind the diamond ring.
While online dating services are not necessarily free, they tend to run just $239 a year, which is a fairly small investment, if one considers that it can end up saving $12,803 due cutting off 2 years of dating.
Interesting how it is taken as a given that once a couple ties the knot, they will cease to go out to dinner or engage in other dating activities, despite the usual injunction for husband and wive to adopt a regular date night.
On gaming online dating systems, see http://www.examiner.com/article/uncovering-the-secrets-of-successful-online-dating
For the studies that question the claims of accuracy online dating sites claim, see Dating Data Analyzed