First, the recent high rates of productivity growth are clearly above secular trends and suggest that firms have been working employees more intensely, deferring maintenance, and taking other temporary measures to raise output, behavior that is characteristic of the early stages of an employment expansion.
Second, I see little evidence (for example, in the job flows data) to suggest that the pace of structural change today is greater than it was after the 1990-91 recession or in the expansion of the mid- to late-1990s.