I cannot say for modeling/exploring but giving you a soft example through Disciplines with my Chincoteagues. Chincoteagues came out in April ish. Possibly mid? I believe. Nonetheless, I have off and on been heavily showing them since then and just recently the first two I created hit level 50. They have either a training boost of 0/1, maybe even 2. Nonetheless, the lower the training boost, the longer it takes to reach level 50 as level 50 gives the foals a training boost of 10 and they can go a lot farther then their parents can. By the time they are done training, their boost will be at 10.

Training boost is figured out by taking the level of the stallion adding the mare and dividing it by 10, thus base level of 50 for both parents is advised.

Thank you very much for this info! 

You're welcome. 

Hope you can figure out information for modeling/exploring though!