I often see in the VLQ review queue posts that are flagged for their length and content. Often they are, indeed, very low quality, but they are valid answers. Since my options from the review queue are "looks OK" or "recommend deletion," I usually say they look OK since they don't deserve to be deleted, just downvoted.
I assume that they end up in the low quality queue because they are often very short, one line answers with no sources. But they answer the question that was asked, albeit poorly. Were I to click the "recommend deletion" option, I would be presented with 5 choices, none of which would describe the answer in question.
In short, is length really a factor of answer validity on this site? On any SE site? Should these questions be ending up in the review queue?