FYI - The point for lag is at impact not afterwards. Everyone's trail arm straightens after imapact. The frames Allen has posted so far of impact are the closest to impact (i.e. ball near club head) in the clip.
With regards to Moe - Moe reproduces at impact his address position and his address position has his arms fully extended. If you mean to infer that you reproduce your address position at impact that can be evaluated.