I saw a case of EB1B case approved for Jan from TSC. Few EB2s from middle of december are approved recently. So my assumption is , they are processing around mid-december . All these cases I saw were non-concurrent ( i-140 approved before i-485 filing). So I believe it gonna take at least another month before they start touching EB3 for jan. Eb2 should be in couple of weeks. And add another month for concurrent filing ( non-premium). In some blogs, they saying EB3 are few months behind EB2 , but don't know how true is that.