Yes. I am looking towards that timeline for couple of reasons.

“Three months. Tops”

Russia needs some time to prep for the offensive — which is underway right way. Then the offensive will begin. (a month, or may be two). Then the winding down will happen. They will hit a point where they cannot regenerate faster, that will be the point where the culmination will begin. Ukraine needs to defend. defend. defend. And then right on que, they need to let the wheels fly.