After Sebastian Vettel's lap one retirement with suspension damage sustained following a bizarre puncture just two corners into the race, Hamilton conjured what he felt was one of his best drives.
Seemingly freed from the personal mental anguish that has troubled him in recent months, Hamilton chalked up his third win this year.
It was not enough for Hamilton, though, to prevent Jenson Button from becoming his first team-mate to beat him over the course of a campaign since he started single-seater racing in 2001.
However, both drivers have always stated race victories are of more importance on the basis of what it does for their self-confidence and the morale of the team.
Now they are both tied on three wins apiece, Whitmarsh is expecting a battle royal at Interlagos in Sao Paulo when the curtain finally comes down on the Formula One campaign.
Whitmarsh said: "We'll remember that win for the Lewis we know and love, and I think he really enjoyed it.
"I think it was an important one for him. He was strong all weekend after coming into it in a good frame of mind, focused.
"It was for Lewis to reset where he is, and where he is at in his head.
"It means both drivers have three great wins apiece this year, and I'm sure both of them think they can make it four by the end of the season.
"I know them both well enough that they will want to be the driver who comes out of the year with four wins. They'll both fancy their chances of winning in Brazil."
For Button, who was third at the Yas Marina Circuit for his seventh podium in his last eight races, the 31-year-old at least conceded to some degree of satisfaction in beating Hamilton this season.
"You have to do everything to be happy with your season," Button said.
"You have to win races, you have to get more points than your team-mate, and consistently do a good job on race weekends.
"You need a bit of everything, and it's nice finishing in front of your team-mate over a season.
"It's not easy when your team-mate is Lewis Hamilton because he is extremely quick, but we've had some good battles this year.
"For me, I take away the battles, the fights we've had - and we've actually only touched once - and the competitiveness between us."
As for another degree of one-upmanship in making it four wins to three over his fellow Englishman, Button added: "I'd love to fight for the win there.
"Obviously Lewis will feel the same, and we'll have a good scrap hopefully, although I don't think we'll be the only people in that scrap.
"Seb is going to want to come back strong, Fernando (Alonso) is on top form, the Ferrari is working well.
"Felipe (Massa) has something to prove at his home grand prix, and Mark (Webber) wants to do a good job and have a clean weekend.
"So there will be six of us really fighting it out that weekend, so I'm excited about the challenge, and it would be lovely to get the last win of the season."
Hamilton, though, was left perplexed by Whitmarsh's remark, and for the second time of late after slating as "rubbish" a claim Button's performances had put him under pressure and had contributed to his demise.
A surprised Hamilton said: "For the life of me I don't know why he would say that because that's not the case.
"Of course we both want to win, but it doesn't matter whether he or I get it, we still end up on a high. That's my view anyway."
Hamilton also brushed off being beaten by Button in the drivers' championship, insisting it is only the title that matters.
"For me it's irrelevant whether he has finished ahead of me because we want to win the championship," added Hamilton.
"Some days when you play golf you have an off day and you lose, well this has been an off year.
"It's not too bad to have an off year considering I've been racing since I was eight years old, and considering the stuff I've been going through I don't think I've done too bad to be where I am."