Not necessarily! I know my WH ratio is .75. I don't think it matters in terms of tucking, though. I'm still high and short-waisted (they usually seem to go together), so even if my waist was 22", I still wouldn't be able to tuck.
Steph, I don't think being busty in and of itself precludes the option to tuck. I think it's a combination of things. If you're busty and long-waisted it works out. Actually, a full bust can actually balance a long waist. But busty and short-waisted? Forget it. Like I said, at least one thing has to be true.
As to the question about skinnies, I have never been under the impression that everyone can wear them the exact same way. I still think pears and hourglasses with fuller hips should keep their tops at least to the crotch or mid-thigh, and balance it out with chunky shoes or boots.
I just don't think there are too many different ways to tuck. All you can do is change the position of the waistband and the type of shirt you're tucking.
It's the same with belting at the waist, which is another thing everyone seems to insist everyone can do. I don't agree at all, and actually, in my "real life" outside of YLF, I have had family members tell me flat out that belts look bad on me (family members who otherwise don't care or notice what I wear). I have to side with them 100%. Any kind of outfit that depends on or focuses on waist emphasis is not a look I embrace. I don't mind waist emphasis but it has to be subtle and secondary.
Angie, I do not tuck into skirts. I did a few times, but only into one skirt because it was a knit. Now I no longer wear skirts, and if I did, I still wouldn't tuck.