I wonder if more people have received insurance cancellation notices due to Obamacare than have managed to sign up for it via the website
— Senator Rand Paul (@SenRandPaul) October 24, 2013
Update: Asked and answered...
Over 500,000 individuals have seen their insurance policies cancelled in just 3 states. In all 50 states, only 476,000 applications have been "filed" in an exchange.