I had the same thing happen. I trained 4 players in RB (C/PF, lvl 9/8 trainer) for 8 weeks, and had only one player pop in Inside Shot.
It appears that what we thought we knew about the training of secondaries was highly optimistic. It will be very difficult to see just how long it takes to have a secondary skill pop twice, because the primary skill will increase very quickly (perhaps too quickly). In order to really know the speed of the secondary training, one would have to train the same primary until the secondary popped twice; from my experience that would mean training only one skill for more than a season and creating mono-skilled behemoths in the process.
For instance, I'd suggest an 18-20yo player will pop in RB twice every three weeks (I'd assume this is also accurate for all other skills, but haven't tested it yet) or 7-8 levels per season (not including playoffs). So a player could easily be trained from respectable to wondrous in a primary skill during the course of one season, without his secondaries popping twice.
The prevailing wisdom around these forums has always been to rotate training. I am apt to agree, as longer I trained RB during my 8-week study, the more I saw my team suffering in other areas (i.e., I now have a player with prominent RB that still has atrocious SB).
@WFU03:
Perhaps it would be best to remove the suggested # of weeks from secondaries altogether in the first post. For instance:
RB C/PF
Trains RB 1-3 weeks
Also trains IS, ID
the futher away from the other skills the skill you are training you get the slower it promotes...
if all the skills on the player is at the same level the pops will be more often.
That was not my experience with rebounding at all. I found all pops to come at rather regular intervals, regardless of the player's side skills. For instance, during my 8 weeks of rebounding training last season, I trained two players who started out with the following skills:
Player A:
Inside Shot: average Inside Def.: strong
Rebounding: average Shot Blocking: average
Player B:
Inside Shot: average Inside Def.: strong
Rebounding: mediocre Shot Blocking: atrocious
After 8 weeks of RB, the players looked like this:
Player A:
Inside Shot: average Inside Def.: strong
Rebounding: prolific Shot Blocking: average
Player B:
Inside Shot: average Inside Def.: strong
Rebounding: prominent Shot Blocking: atrocious
As the players were 19 and 20yo at the time, all pops came at regular intervals of 1-2 weeks (or more accurately, 2 pops every three weeks). I find it had to believe that either player's strong inside defense helped them pop more rapidly, or that Player B's atrocious shot blocking did much to speed up his training.
(I have only continued to train Player B at the request of other users, to test how far up the rest of his skills can go before the atrocious SB really starts to hinder his training in other inside skills)The only reason I stopped rotating my training was to further the discussion on Training Speed Analysis. We're all in this to learn something. What we can sometimes learn is that the rules are a little vague in places and it takes skeptics among the userbase to discover exactly where the lines are drawn. If we all blindly follow what the rules say, we never get to find out what they really mean.