It seems you're attempting to convince people to use the word "retard" less. Introducing another term, and haranguing people for using (or potentially using?) that idiom incorrectly as well, is a rhetorical technique unlikely to accomplish that goal. However, if you need to get it off your chest anyway, I'll stop complaining about it.

[EDIT] The fact you think LD is "my term"...

I just counted. There are 536 comments [aside: why the hell hasn't this discussion been throttled off the front page by now?], and every single one that mentions "LD" or "learning disability" is either yours or in a thread responding to your use of the term. There is one "learning deficits" that seems to be someone else...