i recieved this email:
There will be no change in GMATÂ® content. GMACÂ® will continue to provide the same reliable, valid and comparable GMATÂ® with ACT(r) as it has with ETS(r). We have no plans to change GMATÂ® content during the transition period. The GMATÂ® test is a quality exam of which we are very proud.
Those "thousands and thousands" of GMATÂ® questions belong to GMACÂ®, not ETS(r).
I hope these comments allay some of the concerns you expressed in your email.