I've used Minolta, Canon and Nikon over the years, and the ones I've used with TTL OTF flash metering worked fine in the same situations where my old Metz 60CT-1 always worked flawlessly - like a wedding reception, or any other indoor setting.
But the one situation I really wanted TTL flash to work was fill-flash. In this area, TTL is no better at flash than it is in ambient light. It's only as accurate as the reflecting surface the sensor in the camera "sees". If the subject moves, the sensor "sees" a different reflectivity and adjusts the flash power, just like with ambient light. Take glamour work. The so-called "distance" info that's transmitted from some lenses to the camera body, to adjust for foreground, work just fine - if she's completely nude. But if she's wearing any clothing, or if you compose for effect, the flash output varies according to that sensor's "line of sight". For me, it's easier to look at my distance to subject (all my lenses have distance markings), find a flash power setting that gives me the correct ratio to ambient, manually focus and then move in and out to maintain focus, keeping the flash "at range". Otherwise my pics could be all over the map. I know the Minolta I last tried with Distance info TTL (Dimage 7i) just last year produced disastrous results with their own 5600HS(D) flash.
As for the camera systems which fire "pre flashes" to determine flash exposure, again, you are dependent upon what the sensor "sees" - no real benefit.
Again, this is MY experience, and therefore my paranoia. Haven't tried the F100 with an SB-28 or SB-80, so they may work great. That wouldn't help me, 'cuz I use a Fuji S2, and the F/N80 cam it's based on doesn't include distance data for the flash output, so it'd be a total crap shoot outdoors. I trust manual power at a specific distance more than "what's the sensor seeing now". And for average, day-in & day-out flash stuff, the old Auto (thyristor) circuitry and settings work just fine. Sometimes, even outdoors.
If only someone would incorporate the old "Flashmatic" type flash system, where the flash output was based SOLELY upon distance to subject, and allow for fine-tuning by the user....I'd be one happy camper indeed.
JOMO, TIFWIW, YMMV.....