I think the better way of perhaps wording it is: Does the style or technique of the back swing matter?.. to me the answer to this is categorically No!
All that matters is the ability to consistently deliver the club face square at impact. Look at swings like Rose, Adam Scott etc, and they get described as text book. Yet Furyk had more loops than the Nemesis ride at Alton Towers, Garcia, Fowler have big loops, DJ has an unbelievably closed club face at the top, Spieth is upright.
The list is endless of superb players with what would be classed as fundamentally flawed swings in the text books but they consistently deliver the face of club correctly at impact.
I understand why people go in hunt of swing rebuilds to get better, hasn't Leadbetter even created the 'A' swing methodology to do just this create a repeatable alternative action that does one thing, deliver club face correctly at impact, whether you like the guy or technique or not I like the idea that he wants to make it simpler to square the club.
But again it's purely matter of opinion and mist people want a swing that does both look good and performs good perhaps this is our gilolfing vanity. Personally I'm not worried about if it looks good just if it perform, I'd take a Furyk swing all day if it consistently worked.
