We were at WDW the end of Feb and first of March, right before the virus became known. We had never eaten at the Yak and Yeti, but our daughter loved it, so we tried. We got a same day adr easily. The food was excellent. My husband said the coconut shrimp was the best he ever tasted. I had the honey chicken with white rice, and it was excellent. Their won ton soup was the best I've ever tasted, and I've tried it a lot of places. We liked it so much that we made another next day reservation later on. It has become our favorite restaurant at WDW, including LTT which we love too.
BTW, it wasn't just Yak and Yeti. We got several same day adr's without a problem all over WDW.