Eh, I don't know about that... my games are all pretty on point with making their con saves when taking damage - my sorcerer is edging closer to the day when she's finally 'chip-proof' - that is, cannot fail a DC10 Con save, and so cannot lose concentration on damage under 22 - and it's an exciting milestone to be anticipating ^.^
There are exceptions, of course, but there are a lot of other factors, not related to rule implementation, than make computer D&D feel different to PnP D&D. The computer can handle a much greater number, and much more diverse, foes than a human DM; the computer can instantly calculate to hit odds without breaking a sweat and select targets accordingly; battle maps are often larger, making ranged combat more important relative to melee, etc.
