Yeah; all the DC books, even the most elite at the time, were found to have inadequate sales by Didio and co. because ALL sales were and remain inadequate in the industry. Grant Morrison's Batman Inc. was in every way a total and genre-defining success (good enough to be a best seller and get college dissertations written about it)... and it still got put in a massive hiatus at the time. Dick as Batman was also an complete success... and he got relaunched back into a B-line title anyways.
It's why the reception of the book matters so much more. The Red Robin solo was a success in that since, and different enough in premise and reception to make it a poor companion for the New 52 version of the character - sort of like how, oddly enough, Jason Todd's still villainous role in Pre-Flashpoint comics makes a bad companion for his more successful New 52 Anti-hero, given how even Grant Morrison's version was largely disliked even if he functionally worked for Batman Inc.