I don't think Sklansky is talking about low stakes. Playing $10NL, 4xBB gets no respect. You have to add a BB per limper just to thin out the herd a little. I would even say you need 6-7xBB from EP if you're first to act with a strong hand.

Since I've started doing this, the suckouts have definately decreased. Is it perfect strategy? I don't know, but it has helped me a lot.