Well, I'm not sure we can rely on the small sample we have available on GMAT club to make such an inference. I think Gprep should be used as prepatory material only and not so much as a indicator of the actual score you will receive. If you are comfortable with all the concepts that are covered in the official materials you should be prepared to do well on the test.
Also, according to their press releases, GMAC has known about scoretop for years. If they were going to change anything that drastically, surely they would inform test takers and the changes would be reflected in their new diagnostic software. It seems counterproductive to release a new product (focus, I believe it's called) only to have it not contain concepts currently tested on the exam.