I'll update this properly when I get the chance with new graphs and sh!t. However, in the meantime:
I went through the sticky again seeking out updated posts with order numbers, dealer info and estimated build weeks to see what can be learned.
Short Story:Not much. We don't have enough data to make conclusions and even where we do have data it is debatable how useful it is. For example, if one dealer estimates BW 23 and another BW 35 are they both accurate or is one grossly underestimating and the other just playing it really safe?

It seems clear to me that estimated BW do not tally much with what we would expect.
Longer Story:Ok fine, lets have a go anyways!
So, its quite interesting to look at MonkeyHanger vs others as his order is early on with no options. MH has an estimated BW of 23 on a stock GTD. I have to assume GTI and GTD are the same really as to seperate means we have virtually no helpful data at all.
MH vs Jimble - Addition of DSG, PP and ACC pushes order back to BW35
MH vs Gung-Ho - Addition of DSG, PP and ACC pushes order back to BW27
MH vs Matchboy - Addition of PP pushes order back to BW27
All the above are on orders placed at end of March/early April. Order # are 2317 or 2318
Hmm...
Jimble vs Bear - Similar spec, Bear orders Leather and a month later, same estimated BW! 2317 vs 2322.
MH vs Hawaii-5-0 - Similar spec, H50 grabs DSG pushes order back to BW27
MH vs MH2 - Similar spec, MH2 grabs DSG no effect on BW
Hmm...
Lets look a specific options instead:
Colour: Not enough info, no exotic colours ordered and posted BW or order # info.
Order Date: Impossible to analyse without more dealer info, e.g. more data points and order X/X at dealer.
DSG: No apparent effect on BW (but possibly MH dealer underestimates effect)
PP: No apparent effect on BW (but possibly NickNotts dealer underestimates effect)
ACC: No apparent effect on BW (but possibly NickNotts dealer underestimates effect)
Sunroof: Bumps BW to 35 (Jimble and Bear are only BW35 and only sunroof orders)
Sample size is 10

Any questions/requests?
EDIT:
If I was smart/better at coding then I would write a small program to data mine the VW order system by pluging in each order number starting with 2317xxxx up to 2325xxxx and grabbing the dealer, GTI/D, PP, Transmission, doors and colour data to go with that order number. That should give us full coverage of the entire country (assuming website works for all order #) but without the full list of options. When BW start being posted (in 2-3 weeks time I assume) we could get some really good data.
So, any of you chaps any good at this kind of thing? I know it can be quite easily done as websites like SC2ranks constantly trawl other websites to amass their data. All it has to do is request "
http://www.volkswagen.co.uk/owners/track-my-order/doingPaperwork?orderNumber=23xxxxxx" and then record a few pieces of info in a csv file. I'm guessing this is half hour job for someone who knows what they are doing.