Mercedes has emerged as the early 2014 favourite.
And of that pair, Mercedes out-lapped Ferrari to the tune of almost 300 kilometres - a race distance - over the four days in southern Spain.
Nico Rosberg even did a full grand prix simulation, complete with pitstops, while others were grappling simply to run their radically-new cars.
"There was an element of psychology in the (Mercedes) game," respected Auto Motor und Sport correspondent Michael Schmidt said.
"They wanted to demonstrate strength at a time when the great enemy Red Bull was on the floor," he mused.
Officially, Mercedes has played down any suggestion it is the early title favourite.
But "I think the Mercedes package looks quite strong," he told Britain's Sky. "They do a lot of laps and I have a feeling they are in the front right now."
Others with Mercedes power are also happy. Sir Frank Williams' team moved from the Renault camp over the winter, and after grandees Mercedes, Ferrari and McLaren, lapped more than any other rival at Jerez with the new FW36.
"Frank Williams went to the Mercedes motor home on Thursday night to personally thank Niki Lauda and Toto Wolff," Schmidt revealed.
Sutil, however - having moved from Mercedes engines at Force India to Ferrari-powered Sauber over the winter - said Ferrari is also in good shape after Jerez.
Ferrari is also happy with its new red works chassis, the F14 T. The famous Maranello marque has struggled with its wind tunnel data in recent years, but a complete overhaul is now bearing fruit.
"The technical parameters of the F14 T, as well as the aerodynamic validation we saw on track, match our expectations and provide a solid starting point, which we must now exploit as much as possible," said team boss Stefano Domenicali.
2014 first test at Jerez generated to following statistics:
Fastest lap times for each driver:
1. Kevin Magnussen, McLaren, 1m 23.276s, 162 laps
2. Felipe Massa, Williams, 1m 23.700s, 133 laps
3. Lewis Hamilton, Mercedes, 1m 23.952s, 121 laps
4. Jenson Button, McLaren, 1m 24.165s, 83 laps
5. Kimi Raikkonen, Ferrari, 1m 24.812s, 78 laps
6. Valtteri Bottas, Williams, 1m 25.344s, 42 laps
7. Fernando Alonso, Ferrari, 1m 25.495s, 173 laps
8. Nico Rosberg, Mercedes, 1m 25.588s, 188 laps
9. Nico Hulkenberg, Force India, 1m 26.096s, 17 laps
10. Sergio Perez, Force India, 1m 28.376s, 48 laps
11. Daniel Juncadella, Force India, 1m 29.457s, 81 laps
12. Jean-Eric Vergne, Toro Rosso, 1m 29.915s, 45 laps
13. Adrian Sutil, Sauber, 1m 30.161s, 103 laps
14. Jules Bianchi, Marussia, 1m 32.222s, 25 laps
15. Esteban Gutierrez, Sauber, 1m 33.270s, 60 laps
16. Marcus Ericsson, Caterham, 1m 37.975s, 12 laps
17. Sebastian Vettel, Red Bull, 1m 38.320s, 11 laps
18. Kamui Kobayashi, Caterham, 1m 43.193s, 54 laps
19. Daniil Kvyat, Toro Rosso, 1m 44.016s, 9 laps
20. Daniel Ricciardo, Red Bull, 1m 45.374s, 10 laps
21. Robin Frijns, Caterham, No time, 10 laps
22. Max Chilton, Marussia, No time, 5 laps
Amount of laps around Jerez for each F1 team
1. Mercedes, 309
2. Ferrari, 251
3. McLaren (Mercedes), 245
4. Williams (Mercedes), 175
5. Sauber (Ferrari), 163
6. Force India (Mercedes), 146
7. Caterham (Renault), 76
8. Toro Rosso (Renault), 54
9. Marussia (Ferrari), 30
10. Red Bull (Renault), 21