Due to the recent Google algo changes, I've noticed drops in some of my article directories. However, my Squidoo lenses are making a comeback. Go figure!

This has been predictable up to a certain level of course and since several months ago, even well before the latest major Google update, I found the submitted articles not accessed nor read by people as before. It seems that such article directories are gradually losing traffic shares, although some of them are still hot and have retained their fixed web positions with no fluctuations or changes at all.

Submitting articles can still be considered as one fast way of building a few links for websites and hoping to receive some visits, especially when the websites are still in Sandbox and struggling to be found by potential customers and viewers. One more point is that a lot of indexed articles on directories are getting delisted now and so, not many backlinks can be gained by submitting articles any longer.

I think is it certainly from Google Update whch distinguish some Article directories

yes - very poor viewings on Goarticles