People (including myself) were upset that we couldn't do any realtime audio or video without having problems such as hickups, static, crackling, distortion, etc. due to latency problems with this laptop. When runing DPC latency checker, there would be red bars every 3-5 seconds.

Recently updated to the new Bios A07 and installed new catalyst drivers as well as new Intel Wifi Drivers that just appeared on the Dell Website as well. Ran DPC latency checker and voila no more red or yellow bars at all!!! Nothing is disabled in services or bios. Theres is still aways to go but looks like we are heading in the right direction.

Here is my setup
Studio XPS 16 (1640) Laptop: Intel Core 2 Duo P8600 (3MB cache/2.4GHz/1066Mhz FSB) w/2.0MP Integrated Webcam
Windows Vista Home Premium 64-bit
Intel WiFi Link 5100 802.11a/g/n Draft Mini Card
Dell Wireless 370 Bluetooth Module
90W AC Adapter
125V Power Cord
4 GB DDR3 SDRAM 1066MHz (2 DIMMs)
Blu-ray Disc Combo (DVD+/-RW + BD-ROM)
512MB ATI Mobility RADEON HD 3670
16 inch Edge-to-Edge HD Widescreen WLED LCD (1366x768)
320 GB Free Fall Sensor Hard Drive (7200 RPM)
6 Cell Primary Battery (less info)