Readers are writing in to tell us that AT&T is backlogged on their iPhone activations while Verizon and Sprint appear to be handling the load a little better.

One reason is likely sheer numbers. Our survey (below) shows that US users are picking AT&T over Verizon and Sprint by a significant margin (mostly for the Data speed). We’ve also heard that Apple was expecting this and stocking up to five times as many AT&T iPhone 4Ss as Sprint or Verizon iPhones.

So which iPhone did you pick up?