Ok, since I have played all versions of D&D, from chainmail and first edition, to 3.5, I consider the following true:
-Chainmail was about historic battles, except from the last supplement, practicaly there was no magic element. In short, Chainmail was a historic battle simulator, based on miniatures, with a primitive combat system, and much fun without even a single moral consideration (there was nearly no RP factor).
-Dungeons and Dragons (the 1st) was a tabletop game. It's rules were a bit more complex than Chain, but still, you could have your entire char sheet in a contact card. Moreover, it's RP factor was limited to player interaction, since D&D 1st, was basicaly a dungeon crawling game. (Hence the name D&D)
-The 3rd (and 3.5) editions, are basicaly an uber balanced system, with heavy doses of simplification relative to the 2nd. The two primary factors of this latest edition, is balancing everything (classes, races, skills, spells, magic items) and making the game more user friendly, by standarizing everything (anybody remembers the suplement "Followers of Vecna"? It had a full article about what finger combinations must be done to evoce specific powers of the hand of vecna...)
-And now, the hot shot: 2nd Edition, Advanced Dungeons and Dragons. Practicaly, this is the game that all the ruckus is targeted to. You ask if it has a dose of realism? In the core books, none at all. But many supplements, had very extensive and accurate articles, acompanied by images, that yes, indeed, could be considered realistic. BUT in no case, and in no D&D supplement the last 40 years (chainmail included), there is a single element that bears a realistic resemblance to RL practices of magic. The majority of elements that got near realism, were at best decorative articles, that were meant for the DM to provide a more accurate description, not for the players to actually follow step by step so as to emulate rituals. And of course, the pointer about the Author of the discussed article, being a past satanist and having witnessed what "the Necronomicon can do", is the final absolute shot to his lack of comprehension of this world (wisdom 2? Maybe 3?).
void boasting()
{
cout << "-Note, that I own every last supplement written, published, or coauthored by TSR and WoTC, and have read every official single line, D&D related (except the dragon and dungeon magazines, that I own only a couple)."
} //boasting END

:P
One last thing: the Book Of Erotic Fantasy is not published by WoTC, but by WW (!). Yes, things changed much from the times that D&D fans were at open war with V:TM fans...

I for myself, played both, but ended up opting for D&D, simply due to sheer lack of RP capable players...