You betcha ur a$$ I could do it blind folded. Give me 100 cues, mix them up in any random order, and put my cue any where in that mix. I am willing to bet any amount of money I could identify it with my eyes closed.
That old growth shaft hits like a dream. It produces the most pleasing harmonic vibration that just sings to me every time I strike the cue ball. I am not sure if you understand that a Jacoby is every bit a custom cue as a SW. Even though Jacoby puts out a lot of cues, they are still a fine, fine custom cue shop. I've hit with a Jacoby and they are superb. ONe thing about Jacoby is they do a good amount of CNC inlays. CNC in IMO does absolutely nothing for the playability of the cue. It may even detract from the playability due to there being extra pieces that aren't needed. Full Spliced cues are among the best hitting cues and that's why Titlist conversions are so highly desired. They are simple, good looking and very stable in terms of cured wood. With my cue maker, you can guarantee that even his first works are still being played 15 years later. People like Eddie Farris is someone who gradually takes down his shaft wood PATIENTLY. Some people claim to do that, but don't and you will damn sure hear about it at some point or another. Over the course of time, only the truth will remain when it comes to a maker's intent. One thing about SW and people like Lambros (from what I understand) is that they have gone the extra mile to carefully analyze certain woods, and other parts calculating science and experience into the mix to result in an extremely 'perfect' instrument for playing. I'm talking about the quality of the glues, measured down to the right amount placed in the right spots, as well as the type of wood used to attain the correct combination of weight in all the right places. Joint type such as the 3/8x11 pin that Southwest is famous for as well as the flat faced joint which brings the most surface contact between shaft and butt is something they have looked into and researched extensively and have simply, 'figured something out'.
They are not the only ones though. I'm not going to sit here and name specific cue builders, but, rather, do your own homework and find your own answers. You will find that only you can determine what you like. I refuse to be the one to tell you that. I can be courteous enough to let you in on my experiences, but you need to make up your own mind from there. Ask some of the cue makers in the 'ask the cue maker section' and you will find that they are more than willing to share. I only ask that you continue to 'be respectful' and take your time in all of this.
Enjoy your journey. Savor it. Get a blue book and ask questions. It can be quite addictive, but you could be addicted to worse things. Good Luck.
P.S. Yes, the old growth shaft has deflection. Maybe not as much as a newer wood, cause it is a stiffer wood, but deflect it does. Many of the people on this forum know how I feel about deflection and don't get me started on it. I will recommend that you welcome deflection as a part of the game and learn how to tame it. Otherwise you will be forever running from it like a big chicken.