maximizer - 12:46 am on Jun 6, 2012 (gmt 0)
It doesn't make sense to remove your directory links, it's such a waste of time. First of all, practically, many directories won't even respond to such requests or act on them. Secondly, I don't think it's worth it.
As far as the value of directory links are concerned, I personally think they still offer some amount of value when obtained "smartly" - i) using a "large" variety of target terms in your submitted titles, ii) for newer sites - to incorporate some "branded non-commercial keywords" that would help make the link profile look more "natural"
Apart from general directory, there are also quite a few niche industry specific directories that do still hold some weight in terms of their link value. If you do analyze the backlink profile of many top ranking sites, you'll still find directory links as part of the link portfolio. We can't really tell how much value it adds but it does add to the diversity of the link profile.
The point is submitting to directories might still help but not if it's used as the only strategy in trying to build links. That would not make sense.