Meanwhile, here is New Zealand cyclor Simon Van Velthooven, who won a bronze medal in the Men's Keirin at London 2012, to explain why light winds equal hard grind for the boat's muscle men.
Despite relinquishing the point advantage they held at the beginning of yesterday, Oracle Team USA helmsman Jimmy Spithill is refusing to panic, especially with the experience of overturning an 8-1 deficit to the same opposition in 2013.
Team New Zealand needs to win six more races to return the Auld Mug to the Royal New Zealand Yacht Squadron in Auckland, where it resided from 1995 to 2003. "We are really happy with the outcome from this weekend but we are going to be a lot better next weekend".
However, despite Emirates Team New Zealand securing back-to-back victories on day one, Burling is not getting carried away just yet.
"There are so many things we can work on and improve on", he said. "We never stopped trimming and the boys got an absolute flogging". We are dying to know.
"We've been here before, it's not over", he said.
And while other observers said the two wins gave New Zealand a significant psychological boost, Mr Unflappable, helmsman Peter Burling, kept it typically understated: "It felt like our boat was going really fast, which is really pleasing".
The Americans will spend their time poring over the data and trying to work out what changes they can make to their foil and rudder packages to eke out extra boat speed.
Asked if that meant Team USA might borrow some ideas from New Zealand, Spithill didn't balk.
Today we sailed a fair bit better than yesterday, but we also made a lot of mistakes and feel were a bit away from where we could be. Burling added.
After all, the 2013 Americas Cup proved that no lead is safe.
"That was certainly another good day for us", said Tuke. "The team's hungry. They're a very, very competitive group".
"To do that (win the cup) we've gotta win eight races".
Oracle earned a bonus point for winning the qualifiers, but it was actually a negative point for the Kiwis, so the first-race win merely erased that.
Burling is determined to use the five days to make sure Team USA are chasing a moving target. However, Emirates Team New Zealand continued to showcase their impressive speed and steadily increased their advantage through the next two gates, holding a 49 second lead by leg 5/7.