Apologies, I should have made that clear. Not from server start, but from when you register. Most good players register on day 3 anyway and therefore you can begin raiding on day 1. The sim strategy would not work if you register on day 1, as you would be in the central 'slaughter zone' too...
I have co-led with LA before - I know who he is...
And, sorry I was reading the wrong column. It should be around 8-10 days from registration, though none of these were top 10 raiders in week 1 from memory.
14 May Registered player (Nightfall) with villages:
22 May Player (Nightfall) [Ragnarök] based village [CAP] Valhalla (rank 5 raider week 11)
14 May Registered player (Atlantic) with villages:
23 May Player (Atlantic) based village  Crop (possibly top raider week 1)
13 May Registered player (Colt Seavers) with villages:
23 May Player (Colt Seavers) [G•] based village [o1]The Human Torch (rank 7 raider week 2)
Certainly not day 15 - under 3.5 anyway...
Not 15 days. Ok I bring your attention to you saying 8-10 day from registration. So your saying 11-13 days from server start. Now some people have a harder time, or perhaps Aslan says 15 for a round number. It's 2 days ahead of what you said, and it's irrelevant as the guide is based on you having it by 15 days. If you have it before 15, well thats a bonus. I'm currently following this guide on s3 and WELL ahead of schedule. (Level 10s after 2 weeks)