I'm right with you on this. I'm an index investor who believes in "set an AA and rebalance, don't time the market." But the bond prices now seem to offer so little upside and such a large potential downside that I would have a hard time investing in the "normal" %age of bonds for my portfolio. IMO, given the present low bond yields, there's just not much wrong with doing a few things to mitigate the potential problem:
1) Favor bonds with relatively short duration
2) Cut back on bonds and increase the allocation to cash (CDs, etc). Use the cash to dollar-cost average back into bonds as interest rates rise and bond prices get pounded.
That doesn't mean that I'd totally abandon intermediate term bonds, but I wouldn't like to see 50% of my portfolio in them. And, while I'm sure the managers at Wellington are some of the best in the business, I don't think they'll be successful in swimming against the stream of lower bond prices when the time of reckoning comes.
When the Fed gets its thumb off the scale and stops suppressing interest rates, I'd be likely to resume my "efficient market" ways of doing business.
Just my opinion.