You are forgetting Billy's tactic is best used in a G14 or K4 where you have "Warp 12 on a Button" to tourque muscle you through. A P51 can't perform his manuver as well if it is low and slow. A K4 can by virtue of its wep and better power to weight capabilities in gaining back speed.
You guys might want to list the aircraft involved and how well they can perform this response tactic to other aircraft. Some aircraft are better at performing some tactics than others. Three different players who are experts in three different aircraft can all three make it look like the same tactic works just fine in all three aircraft. Then when you make them trade rides all three get killed because they don't have the timing down for the new ride.
Which ride is the OP in when he is having his problems against the High YoYo? Which ride is giving him the problems executing a High YoYo?
The list of talented players responding to this OP have played the game long enough that most rides in the game are well known to them. I'm assuming the OP is not at that stage of his game development yet. So he may be better able to use your advice if you tie it directly to his current experience and ride.
Yes Bustr hit the nail on the head,the reason I said it was a loaded question. I would add to bustr's remarks that if the OP would film and submit the film it would be much easier to answer his question in detail.
Now this could lead to all types of smart remarks in some other forums but I would hope that since this is "help and training" that those remarks would be of a constructive nature.There's been much good advice given but most newer players dont have the skill sets to implement this great advice and not knowing the Op's plane or planes of choice the best we can do is "guess" what the proper counter as I dont think it's as simple as do this or do that.