That's a nice idea... but the business market segment is also keen on delivery. The "idea that Apple holds off" should have started with even the announcement of the G5 servers. They should not announce them until the servers are good to go. When you work with corporate budgets, your accounting dept and CFO finds IT expenses critical to fall into deadlines... if a server isn't delivered as promised (say a month later), that could have been money better spent. Do it too many times (say twice) and usually the company will loose the contract.
Let's take the big guns in the server market for example: IBM, Sun, HP/Compaq, and now Dell. When a new server is designed, it isn't announced to the corporate market until they have set shipping dates (big iron and mid-range) and sometimes it isn't even announced until they have them available for next day shipping (smaller servers) For instance, when IBM announced the AS/400, I was able to have one in a week from the announcement date. It was a simple process of calling up the IBM rep, having them fax a pricing sheet, writing up a PO, submitting it to our CFO, signed and accounting faxed it over to IBM, and IBM set a delivery date. That's how business likes it. If you don't have your product together, keep your mouth shut and fix it and when it's ready announce it and also don't give out vague delivery dates of 6 to 8 weeks or by "this date" or sooner. Can you imagine a big iron piece with vague delivery dates??? You have to plan for people to receive these machines and for node hookups... all of which costs money and takes planning.
Even with small businesses, say video editing with a few employees, what if you planned to take on a new larger scale project once your new G5Xserve showed up at the end of Feb. What do you do now with no machine to work on? You face the potential of a lengthened project timeline and possibly violating the terms of the contract with your client. I know what's happened in the past when Apple has screwed up delivery times... you end up subcontracting the work and paying the difference between your billing and your subcontractors if only to guarantee a future working relationship with your client. In the end, though, you just end up p.o. at Apple for not delivering.
If Apple is serious about the business market, it'll need to take some notes from real server providers.