Of course Wizard is correct. Isn't he usually? Well at least with math.
And while by the math it is correct (depending on exact rules), I personally take into consideration more than just math because my top priority is longevity and my circumstance of playing a 'regular' rotation of games.
Specifically to these plays, I really dislike #4. While basic strategy for most games I play, it can and will draw a disproportionate attention from both other players and dealer/pit. So I usually back this play off from BS a bit to tc +2 or so.