Mark Webber is still yet to finish higher than 3rd in the WDC, despite having “equal” equipment to the tripple world champ.
Statistics like that don’t tell the entire story. Let’s take another world champion, Schumacher and compare his team mates using a single statistic. Win ratio’s.
Considering Piquet won his race for Benetton in 1991 before Schumacher drove, I’m not counting him. For the 1994 season, seperate statistics for Letho, Verstappen and Herbert. I’m only counting Irvine’s 1999 wins from the races Schumacher competed.
Here we see that Nico Rosberg triumphs over Schumacher by a stunning 1 to 0 ratio. 100% more wins than Schumacher.
Massa won 2 races to Schumacher’s 7. That’s only 28.5% of Schumacher’s wins.
Barrichello won 9 races to Schumacher’s 48. That’s a mere 18.75% of Schumacher’s wins.
Irvine won 2 races (another 2 with Mika Salo as team-mate) to Schumacher’s 16. That’s 12.5%.
Herbert (don’t forget his 1994 races, but Schumacher won no races in 1994 with Herbert alongside him) won 2 to Schumacher’s 9. That’s 22.22%.
Verstappen, Letho, Brundle and Patrese all were destroyed by Schumacher and score 0 to 5, 0 to 3, 0 to 1 and 0 to 1 respectively.
This means that Rosberg is Schumacher’s most successful team mate, followed by Massa, Herbert, Barrichello and Irvine. Verstappen and Letho didn’t even manage a win in a WDC winning car. Barrichello didn’t win a race in 2001, while Schumacher won 9.
Historically, however, Barrichello has been considered Schumacher’s best team mate, Irvine a one-hit wonder. Rosberg has won that one race, which is still Mercedes’ only win post-comeback. Verstappen and Letho didn’t drive that many races and much like Brundle and Patrese were not exactly considered as terrible drivers. Massa went on to challenge for the WDC in 2008 and has shown to be able to keep up with Kimi and Fernando (at times). Herbert is considered a very unlucky driver in general, but his wins in 1995 were somewhat lucky, with Schumacher and Hill retiring in both, as well as other leaders for his second win, he was never considered to be a front-runner like Schumacher, Hill etc.
I’m sure you could do the same for the other WDC’s team mates and find some interesting, but useless statistics. The best car surely helps, but as their non-WDC winning team mates show, it’s not only the car. It’s not just the engine or tyres. Dominance is not just the other teams doing badly, or your team doing things rightly. Button lost his advantage halfway through the 2009 season, but fended off a storming Red Bull and Barrichello in the second half none the less. Vettel never led the standings in 2010 until after the last race, when it matters most. As much as statistics don’t tell an entire story, they do deterimine the WDC on a completely objective basis: who has scored the most points. How you do this, is up to you.