Apple glad of their customer service

Apple Care published a document about a consumer satisfaction study. The laptop figures were published in March, those for desktop computers will be in June.
According to those, Apple's customer service would be considered the best of all by the consumers.
Here's the Billboard:
For desktops
1 Apple (first in all categories)
2 Gateway
3 Dell
4 HP
5 Compaq
For laptops
1 Apple (first in all categories)
2 IBM
3 Gateway
4 Dell
5 Toshiba
6 HP
7 Sony
8 Compaq
This image drawn from the presentation PDF shows that Apple is making progresses while Dell stumbles.

This is probably a kind of revenge after Dell's recent attacks on other issues.