(1) I know that the geometry is different for track bikes, especially concerning the seat tube. I am riding a 60.5cm top tube, with a fairly long handlebar stem. Actually, I could use a setback seat post, so the 60cm top tube on the cannondale may be a tad small.
(2) I really don't know what things are happening there in the off-season, and the website isn't updated regularly. I will look around, I am sure that I could get better advice from locals.
(3) I always did well in the mid-long distances (about 24 minutes of rowing was the longest, I liked 1500 meters and 2ks, or 6 minute sprints, the best). I would think that my size would be an advantage in sprints and a disadvantage in endurance races, why would you say the opposite?