I didn't watch Sarah Jane. I know the type of fan you're talking about though -- some of my colleagues are like that. But then there's the fan on the other end of the spectrum who seem to be ignorant of anything that came before the Ninth Doctor (sometimes ignorant of anything that came before the Tenth!).
I personally think there's pros and cons with both pre and post new-age Dr Who. To me the Old Age Doctor was more of a scifi sleuth notorious for terrible looking visual effects, whereas the new one is more of an action hero with astounding state-of-the art special effects. I like both formats of the show for their different strengths. Although I wish the show would go back to having more "stand alone" episodes and not necessarily have every series be one long-spanning epic story arc. One thing that I preferred with the older series was the format of having more compact mini-arcs that are more easily digestable for casual viewers like myself. :o jmho