I read this discussion before the blog entry details, and I was going to say White Widow to you. Back when I grew White strains (about 10 years back), both the White Widow & White Russian were known for not going amber.
To be honest 10 weeks is not really that long for that plant you have there, I would expect to go to 12 weeks or beyond sometimes. Maybe you could do a partial harvest, and cut the tallest bud off, then let the rest mature at the one level for another few weeks.