dirkz - 11:05 am on Oct 27, 2003 (gmt 0)

(this results in increase in what you get doing link:www.mysite.com search)

No, backlinks get updated at about the time TPR is updated, and even then you can't really rely on them. You won't see them for new links for quite some time (if at all).

Only in 2 weeks these changes "come in force"

This is highly dependent on how often the linking pages are crawled, that is PR and modification stamps.