The German publisher was onboard much earlier than any of the others, and as far as I can see, was much more supportive (releasing a collector's edition of D2:ED, etc).
Should they wait until every other publisher is lined up and ready to go? Should problems in one region (say with CDV going bankrupt, and no announced North American publisher yet) delay every other region?
Estimates of release dates are estimates. Pretty much the only games that don't slip past initial estimates are ones where no estimate is ever made public.
