As baddies age they get less and less weighted. I had a 60 day late removed from an account that occurred 8 months ago, and it shot my EQ score up over 120 points (still waiting on the other 2 CRA's to update).
On the reverse side, I had a collection removed that was 6.5 years old, and it moved my score exactly 0 points.
From my understanding, 2 years is when the weighting really drops off.