no, logitech drivers have sensitivity option. you turn down sensitivity and increase dpi, mean't to be more accurate. surely thats the only reason why people would use high dpi unless they're have giant resolutions? i.e 5000^2 pixels? the mouse isn't fast or slow in windows but for some reaosn when i go in game, the mouse is REALLY fast.
EDIT: yes the logitech drivers interface changes the sensitive but just alters the sensitivty from windows mouse sensitivity in control panel.
EDIT again: well i guess i've answered my question, the game cursor is so fast because the sensitivity is set from the game not from windows so thus, you'll running from 5200 DPI on games sensitvity.