all very good but
It's not uncommon for IAM/RoSPA trained riders to go by the vanishing point or LPOV as mentioned above, but (a) without much idea how long it would really take to stop mid-corner and (b) without considering that on a corner you're likely to come into conflict with another road user, perhaps a target fixated biker having a "moment". By and large they'll be smooth, "making progress", but sometimes (often?) with a false sense of security. With training comes over-confidence... Even class 1 police riders crash sometimes. Next time you're cranked over ask yourself what would really happen if the LPOV pushed on at speed only to reveal a stinger, pothole or manured surface - could you really haul it up in time?
Practice braking while turning, perhaps on a big roundabout with no traffic and perfect visibility, to learn how it really feels, what the bike does, and how to handle it (don't do this on a track unless you're alone or want to be rear ended!), then reconsider real safe stopping distances on corners. At a decent lean you might need more than double straight line distance to stop, and at max lean stopping just isn't possible, end of.
If there are large hedges, then beyond the LPOV there might be more than just a dodgy surface - consider whether you might need to re-double the distance again, to account for yourself and an (as yet unseen) oncoming unguided missile, i.e. similar rules to a single track road. If all this has you taking some corners like a pussy, but staying alive, I'm all for it. The track is surely the place for blind faith...
Real road corners with visibility to safely attack them, MCN or bike mag photo shoot style, are very few and far between, which is why journos resort to radioed spotters up ahead, to check the coast is clear way beyond the rider's LPOV. Irresponsible, MCN et al?