Neil Stephenson / China Mieville think author "wordy bastard".
The only specific data point I happen to be aware of is "Sir Winston Spencer Churchill's six-volume biography of Marlborough", considered wordy by Stephenson. A brief examination on amazon, however, suggests that the two-volume omnibus edition is only just over two thousand pages, so may actually have been exceeded by the baroque cycle, officially qualifying same for the award.
The only specific data point I happen to be aware of is "Sir Winston Spencer Churchill's six-volume biography of Marlborough", considered wordy by Stephenson. A brief examination on amazon, however, suggests that the two-volume omnibus edition is only just over two thousand pages, so may actually have been exceeded by the baroque cycle, officially qualifying same for the award.