The newest MacBook laptops are out and there's some zip to them.

Or at least that's what Jackie Dove has to say in her review of the new units over at Macworld.

The laptops, which now feature Intel's Santa Rosa architecture, came through with flying colors despite a modest difference in clock speeds from 2.16 GHz to 2.2 GHz on the high end while the low-end remained at 2 GHz.

In spite of these relatively minor changes, the adjustments under the hood appear to make all the difference. A new chip architecture, faster front-side bus, upgraded graphics processor and doubled RAM capacity help improve the unit's speed apart from the clock speed upgrade.

Other changes include new media control keys alongside the function keys, a slightly lighter weight (5 pounds as opposed to 5.1 pounds on the previous revision), larger 120 and 160 gigabyte hard drives for the mid and high-end models and an 8X double-loading SuperDrive on the high end.

Battery life also improved in the new units with a complete charge taking 3 hours and 23 minutes for a fully charged battery to deplete itself as opposed to 3 hours and 20 minutes on the previous 2.16 GHz model and 3 hours on a 2.2 GHz MacBook Pro laptop.

Check out the review for the full numbers, bench marks and frame rates.

If you've picked up one of the new units and have something to say about it, let us know in the comments or forums.