yes, i think the guys at valve forgot to do the same for strafe speed as they did with the forward speed.
I think contacting them will be one of the sollutions, it will be of no real use to simulate this. The only advantage you will have that it will look a bit more 'normal' but most people don't even notice it. Secondly, when valve DOES fix it, you end up with worthless code. You can spend your time on more urgent matters
Perhaps Mike already fixed while we were talking