Not even close my friend. A quick inquiry for the last 18 months in the U.S. shows 32 fatal RW accidents. Among those there are 30 preliminaries, 1 factual (issued 14 months after the accident), and one final (issued 15 months after the accident).
I guess I missed your point then. We're at 5 months with this one and still only have a Preliminary report. No Factual report has been released as you noted in your previous post. I've seen dockets opened to the public in as little as a month or two after the accident. So I guess I don't see any difference in this investigation as compared to others I've been around at this point except for the media coverage.