I'm reviewing the low quality posts list just now, and have noticed that an awful lot of the posts there are from experienced users - 13 of the 28 are from users with 20k (ish) or more rep.
Looking through these answers it appears that these answers are usually a single line of code to answer a simple question. In these cases it's likely that this is simply all that's necessary (as these experienced users well know).
So: Is it right that the low quality posts algorithm picks these up? - does it take into account user rep?
The alternative would seem that there is a problem with over simple answers from experienced users - in which case, how could this be addressed?
I appreciate that my look at this list just now doesn't make for a great sample size, but I have noticed it previously as well.