After researching a bit I found out the fact why a touch attack is so friggin hard to resist, here's why:
A touch attack denies the defender their armor and shield AC (base and bonus), as well as their natural armor bonus to AC. All other armor class modifiers, such as the size modifier, dexterity modifier, and deflection/dodge bonus apply (or don't apply, e.g. if flat-footed) normally. Consequentially, touch attacks sometimes have a significantly better chance of hitting than regular attacks.
Wonder if this applies to wizard spells that are considered touch attacks, like 'Vampiric Touch', as well...
HighV might consider modifying touch attacks...
Just my ramplings...
/Jaq