In prior to the Xeon E5's being avaialbe to system vendors in volume. (very late April '12 and previous) that was true. The delta between the June updates and their predecessors isn't that large. So it really didn't make much sense to release those earlier in 2011 like some suggested. If they are 'woefully bad" now in 2012 rolling back 6-8 months into 2011 doesn't really make that much better. Furthermore, it would have blown the "Plan B" option from being invoked in June if Apple stumbled along the way (which they did).
Not really. Even for he various variants of the "pro" connotation thrown around.
Pro == Enterprise and/or "big ticket price" market. Those market typically are risk adverse and move slowly on capital equipment purchases. A few will be updating at a time but the group as a whole largely does far, far, FAR, more talking and prima donna strutting ( 'either you do exactly what I say or I'm going to the next sandbox to play') than doing.
Pro == significantly above average high performance with more than average (for Macs) prices. Again, typically a substantially slow equipment turn over rate.
The Mac Pro is not the key to the Mac business. Never has been. Ever.
It is growth not profits. Growth is what inflates the Apple stock by large amounts over longer period of times.
The boot code is not Apple's code. Whether the card presents to EFI is the card vendor. I suppose Apple could hand over a wad of R&D money as a bounty for the card vendor to do the work. While Apple does that for some parts for the most part they slide risks to the components vendors side of the table. That's primarily why there are no cards.
If there was a gap between OpenGL and the card that is more so the area where its "Apple's fault".
Apple generally does not have an inventory problem.
http://daringfireball.net/linked/2012/06/01/apple-inventory
They have one of the most highly tuned "just in time" supply chains in the business. That is one reason why they have been highly successful and a primary reason why Tim Cook is now CEO.
If the suggestions you are sending are along the lines of "you should do blah, blah, blah to clear out inventory" then they are most likely being politely dumped into the trash can.
That's like trying to sell air conditioners, ice makers, and "walk in" freezers to Eskimos living North of the arctic circle.