+1 for having a a third list of developers to stay away from. Or, at least providing reasons why these developers are in the specific lists. UrbanCorp definitely should be in the 'STAY AWAY' list for a variety of reasons above and beyond the delayed closing issues.
I would move Great Gulf out of the bad list as I've been able to compare purchasing pre-construction with Great Gulf vs other developers and they in fact deliver a quality product.
Many issues that are encountered in a condo development can also arise from there being an incompetent Board or Property Manager. If the components of the building aren't properly serviced (e.g. elevator, window, and even reserve fund contributions) a 5-star building can quickly degrade. So, if you're buying resale be sure to review the status certificate and question the maintenance fees.