many of my local forum members got the kit. and some of them finished to build and found some bugs (defects) on the parts. 2 screws holes were miss-drilled on the chassis. and some more on F/R bumpers
Tamiya noticed these problems yesterday. and I got informed they will ship new parts ASAP
I think release date would be delayed. Tamiya is working on fixing the bugs
I'll get bunch of extra parts as they find more bugs on the bug.

[EDIT] I was infromed wrong. only the problem was rear bumper. I got replacement and put it on my bug