Hi,
I have a very similar situation. I am the sponsor and I am older than my wife. We married quickly. We were refused because the VO believed our relationship was not genuine.
We submitted our application in Feb 14 and by Jun 14 I could already see the VO was going to refuse us (in his notes).
One thing we did wrong was to not send enough evidence. The package I initially sent was about 100 pages of evidence. By the time we had the appeal we had over 1500 pages of chats and photos etc. I recommend you send as much evidence as possible. But, keep it useful. Don't send 25 pictures of the same thing. Also organize the information in a way that proves your case. My appeal lawyer said she could have helped me build a stronger case before we were refused. I don;t know how to send additional evidence while the case is in progress. Someone else on the forum may know.
I also recommend you submit a request for information from the Visa Office now (search "cic request for information" in google). It will only cost about $5 and you will receive it within a month. In this request, it will send all the notes they have on your case. It's the same thing as the blue book that is sent out when you appeal except it is only up to the current date.
When you read this document you will get a very good understanding of whether anyone has looked at your case, whether you are scheduled to get an interview, etc.. Like I said, when I got this document I knew the VO was going to refuse us.