Strange thing is, I always took Saavik's comment to indicate that without David taking a "short-cut" by using protomatter, Genesis would never have reached the testing stage (or at least not for some considerable time), therefore Reliant
would not have been assigned at that time for the search for a suitable test-planet, and not fallen into Khan's hands.
She was perhaps judging him unfairly, certainly there's no way that he could have possibly known that his rush for results would have led to TWOK. It's a little like blaming the construction workers of the Titanic
for her hitting an iceberg.