bullshit, If you grow SOG and keep them short and get away with zero veg time (this is from clones mind you). And depending on the style of grow and the size of plant you want you can increase veg time from there. From seed you should wait until you see preflowers on your plant to flower (4-8 weeks depending on the strain), basically what I'm saying is there is no definite answer to your question because it all depends on the what,where and how you want to grow your plants. Just keep in mind that once flowering is induced your plants will double to triple in height by the time they finish.