This is a valid concern. There is no getting past a weekly review. What GTD 2.0 does is help me avoid going through long lists throughout the week. I do my weekly review weekly. I look at my A-list daily.One question did spring to mind though about your prioritising by urgency.
You set a priority 'Three weeks from when today?' Ok, but then you add other items/projects to the same list and give them a 3 week priority, pretty soon it's just a list all mixed up of some items being 3 wks priorities from 3 weeks ago, and some being 3 wks priorities set yesterday. I appreciate this is probably hard to understand, it's difficult for me to explain!
Week 1 you set a priority for project A for 3 wks
Week 2 you set a priority for project B for 3 wks
Week 3 you set a priority for project C for 3 wks but project A hasn't been started yet... So now you have two projects with a 3 week priority but one is six weeks old and..
Ugh, now I'm confusing myself...
But anyway - I see your point of view.
During the weekly review I look at last week's Cs and determine if they need to be promoted to Bs. I will need to see if I completed all of last week's As. If I persistently do not, I might examine why not. Maybe I am procratinating or maybe I am persistently misjudging how much I can accomplish in a week.
It's like "The Six-Level Model for Reviewing Your Own Work" (pages 51-53 in Getting Things Done). In 2004 I put "convert dross to gold" as a 40,000 foot vision of what I would accomplish between 2007 and 2009. Now, in 2006, I need to move this goal to the 30,000 foot level of what I want to accomplish in the next two years.
In the weekly review I must look at each item and examine both my level of commitment and the broad timeframe in which I hope to work on it.