the 2 points in question are a.) star/signal grounding and b.) shield/ chassis grounding. both are 2 completely different entities, but the problem lies with the fact that they both are connected together. RR's point is that in their interconnection that it is no longer a TRUE star ground. but, imo, Rick is stating they should be looked at for their individual functions.
theoretically, the meeting of signal grounds individually to one fixed point is called Star grounding. the shield should meet at this point with a wire. even though the switches and pots contact the shield, their signal grounds do not at that point. i understand that they actually do and that is my next point. the one part that throws this whole discussion out of wack is the output jack. it's shield or ground lug also touches the shield/chassis ground with contact at installation point and it's also the point where the signal ground makes contact to that contact points lug. SO, if you do not solder a shield wire to the star ground, it still has conduction where the jack meets the shield. so it's function will work. if you don't have a shield then the signal ground only goes out the output jacks shield/ground lug and the shield function does not exist. that i believe we all can agree on. i believe the crux is whether the signal/star grounding can or should be soldered directly to the actual shield(this can construed as star grounding, but is not actually star grounding). i say no, this leaves ONLY the output jack shield/ground lug through hole connection, or contact point where it makes contact with the shield to make contact with the actual shield. if that nut loosens or worse the connection becomes compromised or corroded, then the signal grounding is lost. the very best way is to have 2 conductor shielded wire output where the signal(star) ground and shield(chassis) ground each have there own conductor. shield to shield and signal and signal ground on their own conductors respectively. that said, the shield and signal ground end up meeting down the line anyway. so the next best way, imo, is the way it is traditionally done and that is to have both the signal/star ground AND shield/chassis ground w/ soldered wire, soldered together meeting at the one place out the guitar at the output jacks shield/ground.
just my 2 cents.
Mike "waldo" Wald
Disclaimer: I make and sell Buffers. I also sometimes Modify, Build and sell preamps and amplifiers. My opinions are not intended to be sales pitches. I am a one man shop and prefer to spend time with my wife and family, i work full time on call and love to spend my spare time doing other things. I only make, modify or build things for those that seek them.