That may be the case when one is there. However, many people applyiing for their jobs do so through sites like tefl.com, and there the figures for Asia appear to be about 45%.
You asked for our opinions, lip420, but seem to be interested only in discounting them and putting forward your views on the situation in Korea, Japan and Taiwan.
ps I have just tried tefl.com again; the figures for those ads mentioning CELTA were:
China – 19/42: 45%
Japan – 2/4: 50%
South Korea – 2/9: 22%