No. I haven't noticed that at all.
If you answer the question very well it doesn't matter if it is a few sentences or a long post like answer. Sometimes more is less and takes away from the quality of the answer.
The curators are not stupid people and know what they are doing and look for quality. If you write a quality answer the chances of getting a decent vote are higher than a few words.
I would hate to have to read some of the answers as they are long worded and take time. Class will always rise to the top.