(Title in Polish - 'Czy upadek mitu Ameryki? Badania nad legalnymi migracjami zarobkowymi z Polski po 1 maja 2004 roku do Stanów Zjednoczonych'). This article presents findings of documented labour migrations from Poland to the US after May 2004. Labour migrations from Poland to US are a rather difficult subject to study. The features of these migrations (undocumented work, violating residence time restrictions, etc.) make migrants hesitant to participate in any kind of social enquiry. Hence existing research on migrants in US are mainly conducted using qualitative methods, limited to usually a dozen of in-depth interviews. The findings presented in this article come from a first study on documented Polish migrants to the US using quantitative methods.