sounds interesting to me so I looked into it (in rather a nasty way). First off, I have to say, I might misunderstood the point you raised. In that case just excuse me, please.
I think you are talking about the automatic correction of lens aberration, using the focal distance information from exif.
My interest here is rather narrower, as I'm not a user of the three models listed in the latest DPP. So my comment is about the "lens distance" infromation in exif data
. (though I'm not a exif guru in any sense)
I opened some RAW files taken recently by 20D using both an older version of DPP and a freeware image viewer Faststone. I'm surprized to see that DPP does not show "focal length" in thumbnail exif data (pic #2), while it ("focal length") has been available in Faststone for quite a long time (pic #1). This applies at least to some of the lenses not listed in the lens list you attached. My guess is that "focal length" must be available for all Canon lenses at least.
The Faststone, however, does not convert the focal length to "35mm equivalent" and this is kept vacant. This conversion can be done however quite easily with the help of a calculator.
To put it short, what I'm saying here is; The focal length data must have been available for long time, as 20D has it. Older DPP just does not show it, although it can be read by at least Faststone and maybe other viewers as well.
I regret again if this is not what you are talking about.
p.s. the left pic = exif obtained from FastStone
the right pic = exif from DPP (ver. 188.8.131.52): sorry it's Japanese but I can assure you there is no focal length there.
The file name shows these two are from the same RAW files. The lens used here is EF20-35mm (an old lens from film days).