But wait, look a little further an you'll see this little tidbit: "Acting under Section 3(21) of the Employee Retirement Income Security Act of 1974, an asset manager becomes a co-fiduciary and shares fiduciary responsibility..."
So, as Ari Rosenbaum also points out, plan sponsors are still on the hook. There is just no easy replacement for understanding the fund lineup being offered and making sure the plan participants have the information they need to make good decisions.