tedster - 10:00 pm on Feb 11, 2010 (gmt 0)
Hello mikus, and welcome to the forums.
In recent times I've had much different results than you report. Yes, there is often a dip in traffic following a domain name change - that's been noted since Google's early days. But recovery of traffic no longer takes 9 months, at least not in most cases. In fact I know of some cases where traffic was back within just a few weeks.
You mention 9 months - did your traffic finally recover at that point?