Is Apple throttling web apps on iPhone? According to the Register Apple is throttling web apps:


  If a web app is run from the iOS 4.3 home screen – in other words, if
  it is saved to the screen alongside local apps downloaded from the
  Apple App Store – and launched into full-screen mode, it runs roughly
  two to two and a half times slower than it does in the browser,
  according to various tests. It appears that whereas Apple has updated
  the iOS 4.3 Safari browser with its high-speed Nitro JavaScript
  engine, Nitro is not used when web apps are launched from the home
  screen.


Is this true?
It's more that Safari was being boosted in 4.3 and that that boost was not available to Web Apps on the homescreen

According to ArsTechnica this is fixed in iOS 5.