That is the catch there.
I use it daily for Enterprise usage and class of service.
For comparison, our product competes directly in TPS with MS-SQL products. We have 10% the hardware requirements and about 1% the Software cost on the server-side.
Yeah... MS-SQL works great on Windows. That brings along the costs of the Windows Licenses and the enhanced Hardware requirements. FYI, former customers that have switched to competitors have to spend $100K per server (up to 5 needed for number of operators) to get the TPS we have using our hosted services.
All I can say is that one former customer in particular has drank the MS Kool Aid has spent well of $500K on just the server side hardware to get the performance they got with our stuff. Not to mention they've had to upgrade *ALL* computers that were running WindowsXP and Windows98. They had VERY few Windows Vista or Windows 7 machines. Oh and new versions of Office were required... plus they had to purchase the MS-SQL licenses and many other pieces parets MS doesn't include.
Sorry. That article you posted... I don't think you read it completely.