Some swear by the Marshall and 'Sanow' data, and others at it
. I'm sure no one will chime in on either side now that you mentioned them...
Newer loadings of small caliber handgun ammo are probably more effective than those available in 1998 (or 2008, for that matter), but none have repealed the laws of physics. No commonly carried handgun will stop a conflict 100% of the time but a full .357 (for example) is more likely to do the job than a .22 LR, .25 or .32 ACP or similar.