My husband and I lived/taught in South Korea in 2005 and had a terrific time for the most part. (I hope your experiences were positive overall, as well.) Unfortunately, I ran into some issues regarding the recruiter and the process I was contracted under. Long story short, I came back to Canada while my husband stayed to complete his obligations.
I applied to the CF online near the end of 2011 and didnt hear anything substantial regarding how things were progressing until April 2012, but I believe mine was completed during that period, because by the time I had my interview last summer I was told everything was good on the security end of things. I'm now merit-listed.
I can't speak for anyone else because everyone's process varies, but I didn't seem to encounter any difficulties even though I ran into some problems related to my time there. I was a little concerned when I initially completed all of the components of the application process (app., forms & paperwork, etc.), but other than it possibly taking a longer time to process compared to other applicants, I didn't run into any problems. I hope that helps a little.