It certainly was.. When attacked from above, do not evade, turn into attacker. Per the man himself Mr. Volke.
Only two main tactics. When attacking from above stay engaged only as long as you can pull lead. Then dive away use superior speed in shallow climb. turn, rinse, repeat. The other is turn into attacker.
No it wasn't ... don't be foolish.
As Krusty pointed out ... the Americans used the "HO", mainly, against planes they knew that had guns that could not "outreach" the M2 .50 cal.
They would fire a stream of .50 cals way before the enemy had them in guns range, but they hardly ever flew, bearing down on their enemy constantly firing until they reached cockpit to cockpit. I don't care who you are and what set of balls you may have, in real life, you don't fly straight into any bullet stream at close range ... unless you have a death wish ... and I will bet the ranch that %99.99999999 of the American pilots wanted to come home eventually.
"When attacked from above, do not evade, turn into attacker." ... Yeah ... turn into him ... that doesn't mean fire nose to nose until you ALMOST collide. Turning into your attacker, which is true in this game too, gives you many more opportunities to setup and/or spoil angles.