Achtung Typhoon!

[dat581]

People like to waffle on about how far advanced German aircraft were but forget the Allies had advanced aircraft under development too. The dH Vampire first flew in 1943 and would have eaten the Me262 for breakfast.

[TBM-Legend]

The dH Vampire first flew in 1943 and would have eaten the Me262 for breakfast.

Prove it!

[Haraka]

The impact of these discoveries - especially advanced projects such as P1101 and P1110 (both variable geometry designs) - was enormous

I think you will find that the prototype P.1101 was intended to investigate the best wing sweep angle and as such was ground adjustable between 35 and 43 deg.
(The Bell X-5 was a totally new aircraft, indeed using VG , but based upon the P.1101 as a start point only)

The P.1110 was not a VG concept IIRC.

[Haraka]

The dH Vampire first flew in 1943 and would have eaten the Me262 for breakfast.

But the Vampire didn't arrive in Squadron service until after the end of the war.
Hardly a fair comparison.

[Fat Magpie]

I dont think it would have been a major step to offer the P1101 with variable geometry in flight.