If you read the article, you get the impression that Dvorak thinks the spreadsheet is recent invention (30 years old). You'd think an old-timer like him would realize that spreadsheets have been around as long as the practice of accounting, and that they were going strong back at the dawn of the Industrial Revolution. The only difference was, you paid for an employee instead of a computer to crunch the numbers. Yes, the speed gain in spreadsheet usage definitely increased its influence, but really... spreadsheets are older than John McCain (and that's old!)!

If you would have read the article, you would have seen that it agrees with your opinion, going as far as to suggest that the best way to shut down this activity would be to utilize anonymity. Infiltrating these recruiter networks to sow confusion and discord, as suggested in TFA, would be highly effective to curtail recruitment in an anonymous environment where little trust exists to begin with.

Given Jobs' track record as a completely ruthless businessman, I'd guess someone on the Expo side of things stepped out of line. Don't want to do things Jobs' way? Fine, Jobs is outta here.