I know this is about Stat Limits and not individual stats, but I felt compelled to respond to people suggesting two opposing and equally misled points of view.
The Latis are the easiest threats on our list to deal with come movepool if we choose to do so. We do not need to focus on outspeeding them. And for the people supporting bottom-barrel Speed, nor do I think we should be underspeeding Politoed.
Since we are advocating such low PT, I don't think we need to worry about outspeeding Scizor, our primary threat. Given low PT, Scizor may be able to OHKO (at least after Rocks) CAP5, making the speed irrelevant. Even given that speed, assuming the low Special Attack, which we've been advocating, and no Fire coverage except for HP Fire, which we've also discussed, then CAP5 may be unable to OHKO Scizor with HP Fire even under Sun, much less Rain or Sand.
i.e. CAP5 with 55 Base Special Attack, 252 EVS neutral nature, Life Orb, Sunny Day - against the standard 248 HP CB Scizor, does 103% minimum, guaranteed OHKO.
Take out the 252 Sp Atk EVs CAP5 would not be using. Even in Sun and still using the Life Orb, CAP5 would do 82% max, failing to OHKO after Rocks.
So basically, outspeeding a threat like Scizor is irrelevant given low PT. And even if CAP5 isn't OHKOed by Bullet Punch, HP Fire can be made so laughable it's irrelevant.
Speed is not the end all be all in relation to every check and counter. There are some things we'd like to outspeed or underspeed but Latios and Scizor shouldn't be them.
To translate that back into Base Stat Ratings, given reasonable Attacking Stats, I think that in terms of PS and SS, we should set arbitrary ranges not currently defined by our words.
PS range of 95-120, while SS should be maybe set 65-90.