Flotsom,
The point was, the 152 is no beast of acceleration in level flight. Personaly, if I want to be fast at a certain altitude, I climb afk 5-10kft above that altitude, and then dive to it. It's a lot like the 51D in this respect. The charts say it's a top tier plane, but in practice it's really nowhere near spectacular if you catch it when it just got done knife fighting. At that point it's dead in the water, especialy without wep or altitude to dive thru. It only leaps away with level speed like the chart seem to imply when you're past 300mph or so, the speed at which most "middle tier" planes top out.
Sum all the good and bad of both it and the spit9, and the spit9 comes out with an overall advantage. Where the 152 has advantages, they're pretty minor. The spit9 is no slouch at retaining E. It takes a lot of experience and leaves very little room for mistakes to really exploit the 152's full potential without falling back on extreme bnz. IOW there's only a few circumstances where the 152's performance (as opposed to the pilot's abilities) will really dwarf most planes, such as the spit9. That's what I meant with the spit9 anecdote. It's not such a high altitude monster as people might think from hearsay, unless it's kept very very fast. At those altitudes, that means some really very stretched out trajectories and a pretty slow rhythm of intersections between two planes in a 1:1. For that to quickly pay off with outright kills, as opposed to just stalemates or bandits simply running away tail-tucked, you need more numbers.. 2:2 or 3:3 at least.
All things considered, most of the time the 152 icon in an AH furball says "easy kill".