The Google videos take approx 165 minutes to watch end-to-end, so there's no reason why people can't spend the time to watch and study them all.

The knowledge in the Google Analytics exam is very practical and hand-ons, it would suit developers and people directly implementing GA rather than managers wanting to understand reports.

After doing the GA IQ exam you would really need to then push beyond it and get into a better understanding of reporting and segmentation. Books will always be the best source for information like this, Web Analytics 2.0 and Advanced Web Metrics, 2nd Edition are the best sources for advancing your web analytics skills.

Study Tracking via Excel
Below is a list of the videos and length of each video (as of April 2011).
Breakdown of Google Videos and study progress

My Notes
Surprisingly, after watching all the videos there's only a handful of key facts that need to be remembered. There are PDF cheatsheets online that are worth looking at too however the easiest way to prepare for this exam is to watch the videos and make your own cheat sheet notes.

Campaign Tracking and AdWords Integration
Track all campaigns from (most) networks.

Use Autotagging for AdWords (to track detailed campaigned information).

For all other networks, you need to pass parameters.

Google Analytics takes the timezone of Google AdWords account.

?gclid& is Autotagging.

Cost Data is only available via AdWords.

AdWords = Clicks vs. GA = Visits.

Clicks/Visits can different (cookies blocked, javascript disabled, redirects, GA code not executing).

GA/AdWords data is updated once a day.

URL Builder is in the help center.

Use Excel if doing large bulk URL tagging.


Required

utm_source: referrer
utm_medium: campaign type
utm_campaign: product

Optional

utm_term: keyword
utm_content: ad version

Example
www.shanedevane.net/?utm_source=emailcampaign&utm_medium=email032011&utm_campaign=siteupdate

Reference
http://google.starttest.com/
www.google.com/support/conversionuniversity
www.webanalytics20.com/