First nehalem clock frequency reference demonstrated on IDF Spring 2008 was with dual core frequency 2.13/2.53 GHz. Later associate showed systems on base Of nehalem witch already operate at 3.2 GHz frequency ...
However, as explains associate the result of nehalem processors with 3.2 GHz frequency was as a result of misunderstanding. At this frequency worked the two-processor systems the skulltrail class on base of two Core 2 Extreme QX9775 (3.2 GHz).
Actuality the existing nehalem models work at frequencies 2.13-2.53 GHz, and this information is confirmed by Intel representative . This frequency is completely acceptable for early models. The frequency range will be enlarged with time . It is completely possible that series processors will reach 3.0 GHz.