There's a good possibility.
I've done a search on the ancient rice found in Sakai Cave but I came up empty. Have you found anything on this?
I have heard nothing but the report is published and I will pick it up in a couple of weeks when I get to Chiang Mai. As I recall, the "powers that be" have resisted the findings of domesticated rice in Spirit cave near Lampang so they are perhaps being very careful. Hoabinhian sites are often downgraded in importance by the Chinese for obvious reasons.