it does, but only to a certain point, and there are other much more important factors that pure speed in my opinion

in typing competition websites I reach speeds of 150 wpm, sometimes more than that, but in real life I almost never reach sustained speeds that high, primarily because in real life typing scenarios you typicaly have to think about what you want to type, not just mindlessly type out the things off the screen, and coming up with things to write is mostly slower than typing them out, and also sustaining such speeds for prolonged periods of time is pretty straining

learning colemak made the most difference for me not by virtue of its speed, but rather the comfort that comes with layouts that have a more efficient key positions, fewer finger movements, less uncomfortable wrist movements than qwerty does

if I could go back, and choose another layout, I would probably go with drorak, because I later came to realize that probably finger rolling (which is the primariry technique utilized in colemak) is less efficient than hand alternation (primary technique used in dvorak), but I doubt it makes a major difference, if any at all, and someone with experience with both of these layouts should probably be asked about this issue, and after all, one of the most (if not the most) proficient typists in the world uses qwerty 🤷‍♀️

plus, after about 100 wpm the speed return per unit of time invested starts to really diminish, and it takes a lot of time after that threshold

tldr i don’t think anything over 80 wpm makes much practical sense, and a better keyboard layout plus a split ortholinear keyboard would go a long way in terms of comfort and hand health, hope this helps