Yeah I mean, I'm well familiar with what the charts describe; however, my personal experience with valium puts an equivalent dose to 1mg of xanax at 10mg.
I always wondered if 10mg diazepam truly equates to 0.5mg of alprazolam then why aren't 20mg tabs of diazepam marketed (but 1mg tablets of alprazolam are)? Every psychiatrist I've ever posed the question to (as I've switched between xanax and valium numerous times over my decade of benzodiazepine pharmacotherapy, as well as several other benzodiazepines in equivalent dosages) has agreed that 1mg of xanax and klonopin equals 10mg of valium.
The point is moot, I suppose, because people will tend to use whatever works most effectively for them, but it was genuinely surprising to be reminded of the fact that the equivalence tables put 0.5mg xanax equal to 10 of valium; I haven't looked at those charts in years, ever since I tried to memorize them way back in high school lol :D