UB, thanks for the thread here. I went with topping above the 2nd node this time around to try thing out for myself. What I found was that the bottom set of "tops" on 2/4 plants still haven't caught up to the upper set. They are looking more like 2 tops than 4 as I approach 28 days veg tomorrow. The other 2 plants have 4 dominant tops as expected and look great -- their lower set of grow tips caught up with the upper set in fairly short order.
I topped all 4 girls within 3 days of each other, all around the day 15 mark, but the 2 that reacted funny had smaller lower sets of growth tips when the cut was made. They are both smaller plants -- then and even today still, 1 of them I'm calling a runt. They were showing 5-6 nodes each but again the 2 oddballs weren't quite as far along. Even so, I felt like I followed your instructions.
Any thoughts on this phenomenon? Does it maybe take them a while to even out sometimes, or do you think it's possible I just snipped to early?