Yes, it did. For QuickBooks Pro versions prior to QuickBooks Pro 2011, a multi-user configuration could consist of up to 5 users.
For QuickBooks 2011, that has been reduced from 5 users to 3. The maximum number of users allowed under QuickBooks Premier 2011 remains unchanged at 5.
However, because QuickBooks Pro and Premier share the same file format, it might be possible to create a configuration of 3 users running QuickBooks Pro and 2 users running Premier. That would spare a firm from upgrading all 5 licenses from Pro to Premier.