Cape,
I'm going to be honest with you. One of two things could be true. A. You are not competitive for a ground slot so your OSO is trying to open your mind to Reserves because he have more of a chance to get selected. B. Your particular category/component really doesn't have any ground slots... this truly varies based on program, fiscal year and slot type, i.e. air, ground, reserve, etc. Your OSO has a mission to submit or induct into OCS, x number for certain categories. Right now, most categories are not hard to fill.
As an example, I can tell you if you are a junior in college, there is no mission for regular active duty. I can't remember 100% but there may be a mission for reserve. If you are a junior, he may be 100% honest with you. If you aren't, you probably aren't competitive right now and he's trying to fill one of his less competitive slots. If this is the case, don't take it personally. Work harder, be patient and push for ground later. Recruiting goes in ebs and flows and know that OCS selection boards are more cometitive than they have EVER been before.
I won't say what I do but just know that I know more than your OSO! I periodically look on here as I used airwarriors in 2002. Whatever help I can still provide I do, honestly.