I've owned a 50cm Kilo TT and now I own a 54cm Hour. No overlap on the Hour. A lot of overlap on my Kilo TT (like 2 inches IIRC) Sure you can point your toes down during tight turns, but on my 50cm TT you had to point them fairly sharp for this not to be an issue.

I forgot to a couple times and I almost ate ****, and ultimately bought an Hour for a laxer geo and no overlap. For a lot of people it wasn't an issue, for me it was. I like the geo on my Hour much better. I personally don't see the point of having Track geo on the street, but that's just my opinion.