Seems as if its patched, at least for me. Maybe the most recent update? Was working fine before, but now its detected in almost all servers I go to. When its not detected I get a "Steam Connection Timed Out" as soon as I shoot. (Only when I shoot, which is weird.) I tried both this one on r25 and Papil's Simple Wallhack on r29, both detected.
Update: Also my 4d1 account was banned while using r25. Seems as it is detected.