Yeah it seems that the GPU is a real slow one. So let´s wait and see how their next line-up will look like. I assume that they will equip the new M90 (Whatever the name will be) with a Quadro which would have similar specs like the Go8800GTX, which also hasn´t been realesed yet.
Striving through this Forums it seems that it is very likely that Dell will be one of the first manufacturers to introduce this beast into a notebook. So let´s wait and see.
Until then, I´m still happy with my current M90 (T2500, 2GB, 160GB, Quadro FX2500M).