Dollar cost averaging - Another view

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In my earlier post about dollar cost averaging or long term investing during down markets I had written how it was beneficial to dollar cost average during a bear market.
This morning I was looking at another article on Investor Business Daily's newspaper. They had a small article on dollar cost averaging specifically for down markets or during markets with bearish trend. This article featured under their Myth Buster title titling "Averaging down can be a poison". The author takes an example of Lehman brother's stock and how one would have suffered major losses in such a condition and instead ask to dollar cost average in bullish markets.

My takes on this and comments are slightly different. My focus would be to dollar cost average on an index vs. a stock. Thus if any particular stock is burned then my risk of loosing all my money is certainly lessened.

The article took an example of AIG and explained how an investor would take ages to get back the fortune spent. I would have rather put money in the finance sector, probably in an ETF or a mutual fund.

Of-course buying during market correction is a better strategy but then who can identify a bottom and then a correction.

One strategy recommended which I might partially agree is too sell off if losses get steeper than 7-10%.

What do you think?