That's what I'm thinking, Figment. ; My experience was with a 1977 Pentax ME Super, followed by an early 90's Canon EOS. ; While I got decent enough results with dark photos using 400-speed film, I didn't develope myself so I'm quite sure the lab processing the photos made some attempt at recovery as well on my shots. ; Also, I typically was viewing my photos at the standard print sizes of 4x6 or so...rarely was I blowing one up larger. ; Even at that smaller size, there was still grain visible in ISO400 shots, but it wasn't destructive to details. ; However, when we judge a DSLR's performance, we are often looking at a 100% viewable photo on a 17" or larger LCD screen with 1280 or more pixel resolution. ; Which means we are essentially looking at the equivalent of a 3-foot by 5-foot print.
What I've found is that with DSLRs, 'noise' issues which many complain about even on the entry-level cameras are often blown out of proportion - and if most people were to make an 8x10 print from an unretouched digital photo with a typical crop-sensor entry-level DSLR at ISO800, they wouldn't see the grain in the shot. ; Even at ISO1600, what minor grain would appear would not be destructive to detail, and at least to my eye, would be significantly better than anything one could expect with ISO1600 film. ; And that's with an entry level. ; I would think that comparing the new crop of pro model DSLRs that can outperform the noise performance of their entry-level brothers, the noise signature and detail would be far cleaner than any film equivalent at any ISO.
Lens is obviously a huge factor - comparing like-for-like prime lenses would be a must to have the comparison be fair. ; Also, it would be most appropriate to compare processed RAW results from a DSLR to self-processed film - since JPEG is essentially the digital equivalent to one-hour film labs. ; RAW files, worked in post processing, would be a fair comparison to someone with their own darkroom, pushing and pulling film for the best results.
I would love to see ISO1600 film pushed 2 stops compared to a 5DmkII at ISO6400 processed in RAW with a good noise reduction software and RAW converter...both printed at 16" x 24" or so...I would put my money on the DSLR to be the cleaner result.
But like WDWFigment, my film experience was more as a P&Ser with my old manual SLR...I never had much skill or knowledge with cameras in those days, and never developed my own film.