I found an article on the internet that backs up what Kind Princess says about phosphate in that low phosphate level causes compact growth and higher levels, while highly beneficial to flowering, also promotes stretching.
I'll keep'em on the veg nutes until week 3 of flower. I'll still feed with Fox Farm Big Bloom (0.01-0.3-0.7) in order to provide the plant with trace amounts of phosphate during this period.