I don't know if any of the BBs have answered this and I can't imagine it hasn't been asked, but I don't remember seeing it, so here goes:
We know that the 10% lost from primary training is moved to a random skill, essentially. But was there an announcement as to whether the 10% used for the secondary is based on 10% of the training effect of the primary or 10% of a normal training on the secondary? For example, a 6'0 PG training OD and selected for 10% in ID -- if it's based on the primary skill, the 10% would be much more effective than 1/10 of an ID training thanks to the height being useful for the primary, but if it's based on 10% of training the secondary, the height would drag it down.