It may be, however (IMHO) the main reason there is much more mad strafing in ET than was in RTCW is the slow SMG’s. If you actually try to follow the head of a madly strafing enemy, whose strafe rate matches your gun’s fire rate, you may sadly get no headshots (e.g. he’s moving to his right for one step and your crosshair is dead on but your gun doesn’t fire for that period, then he starts going left and your gun just fired but missed and so forth…)
(rest is off-topic)
It is similar to lightning gun duels in Q3. Both of the duelers are supposed to start moving like maniacs to have the outcome of the fight determined by reflexes rather than aim…
…which is fine if it wasn’t for the lack of weapons that rewarded aim (like decent rifles).
