Edited above, yes.
But Wiggins & Thomas were racing on the road too anyway which is obviously related to Madison if you're looking at it as km instead of aerobic performance.
It's important to realise 'endurance' track events like Pursuit or Madison are named that because it's not a Sprint event involving purely/mostly anaerobic glycolysis (lactic acid) system for upto 30-90s. Pursuit is pure endurance discipline, you've gone deeply aerobic in a 3 or 4km pursuit effort too the same as maximal effort into the start of a mountain and then maintaining threshold up it.
Tactically, though, the mass start events are more immediately transferable to road, with the need to respond to moves, keep an eye on the riders around you, place yourself relative to rivals, and go from riding at less than 100% to full gas in the blink of an eye, plus the occasional pursuit-like effort to gain a lap.
While the aerobics of max effort IP might have some transferability, the time at threshold in the IP is minimal compared to the kind of climbs we're talking here. Four minutes of threshold might explain why Thomas could muscle his way up the Alto do Malhão, but that's very different from, say, Rettenbachferner.
It's like comparing the XC sprint to the 30/50. While they are both very much events within an endurance sport, one is about maintaining threshold for a short period of time, the other is about timed threshold bursts within a much longer event. Most road events are long distances with short threshold bursts which is why more roadies who also do track tend to do points, scratch, madison, and those who do IP/TP tend to be more rouleurs and time triallists in the first instance, and current parcours trends are marginalising that type in terms of major stage racing potential (which is something you don't bring into account when you run through the prior elite riders with track experience, notwithstanding that all of them were road racers in parallel with track rather than track specialists and during the Cold War era when the landscape was very different and the field much shallower). Obviously track sprinters seldom convert to the road because the body type required for keirin and match sprinting is counterintuitive to the needs of road cycling, and the one obvious transfer to point to - Theo Bos - was somebody who could be the fastest if he made it to the finish, but just making it to the finish to contest the sprint was a challenge for him most of the time.
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