Roll was arguable more important than turn, it was relative to more maneuvers. & yes weight creep happenned to MK 12 & 14 Spit compared to Mk 9, & C model Mustang handled better than D.
Um, you are correct about wood tail weighing more. It was done to simplify construction. It was more stable than metal one.
The Germans never really figured on a 5 & 3/4 yrs war. Blitzkrieg was supposed to conquer continental Europe by end of 42, similiarly, the 109 was designed in 35 & doubtful that Willy envisioned a 2000 hp motor in it.
& the comment about G-6 being produced in huge quantites til G-10 came round is not probably not What Willy was thinking, he was pushing the 209 II V5. Had the jet not appeared, this is likely what would have happenned.
At the end of the day, comparisons of late war fighters, 109 K & MK 14 Spit, & Mustang D should include the 209 II. Unlike the MB 5, it nearly did go into production.
I'll toss in a couple more tidbits just for fun.
"Unexperienced pilots hesitated to turn tight, bacause the plane shook violently when the slats deployed. I realised, though, that because of the slats the plane's stalling characteristics were much better than in comparable Allied planes that I got to fly. Even though you may doubt it, I knew it [Bf109] could manouver better in turnfight than LaGG, Yak or even Spitfire."
- Walter Wolfrum, German fighter ace. 137 victories.
http://www.virtualpilots.fi/feature/articles/109myths/
Me 109 G:
"We didn't have time for acrobatics but we weren't forbidden from doing them, though. Snap roll was fast and easy, and the engine didn't cough as in older planes. Immelman turn was splendid when you tightened the stick a bit on the top. The automatic wing slats did their trick and you didn't need ailerons at all for straightening the plane."
-Otso Leskinen, Finnish fighter pilot. Source: Hannu Valtonen, "Me 109 ja Saksan sotatalous" (Messerschmitt Bf 109 and the German war economy), ISBN 951-95688-7-5.
He doesn't say which G, but Finns got G-2, G-6, & a few G-14. It would seem that it was a matter of how to get the most out of the plane. In the book The Aces Talk By Ed Simms, Buehligen said: we could outturn the Mustang in either one, 109 or 190. Different story for a beginner as mentioned by Wolfrum above.