Perhaps someone with who has travelled the road to sub 15 could collate this info into a useful form, perhaps merging it with the getting faster with Fridrich thread:
http://www.speedsolving.com/forum/showthread.php?6085-How-to-Get-Faster-using-the-Fridrich-Method .
By this is I mean that for each stage in the Fridrich post, along with goal times you could have goal breakdowns too:
e.g.(from Fridrich post)
Step 2
Current Average: 1:00-1:19
Goal Average: 40-49 seconds
Learn 4 look last layer (4LLL). (Links to where to learn the algorithms will be at the bottom of this guide)
2 Look OLL
Edge Orientation - 2 algorithms
Corner Orientation - 7 algorithms
2 Look PLL
Corner Permutation - 3 Algorithms Aa/Ab and E/V/Y/Na/Nb
Edge Permutation - 4 algorithms - Ua, Ub, Z, H
Lots of really useful informatiom there, but if the "Goal Average: 40-49 seconds" were changed to Goal Average: 5-10 sec cross, 15-20 sec f2l, 5-10 sec oll, 5-10 sec pll, then people trying to follow the progression outlined in the docment would be better equipped to identify precisely where there weakness is. So for a cuber who has just learned 4LLL, they would have a clear idea of how polished each phase needs to be, and thus organise their practice time accordingly. I for one was frantically working to drop my f2l time, but realised from reading this thread that my cross is letting me down. If a set of sensible goals for CFO and P for each phase of the road to sub xxx were available, the dedicated student could organise their practice far more effectively.
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Also, having watched Felix's slowmo vids on youtube, I reckon he is roughly 1 sec cross, 3 sec f2l, 3 sec LL. Is a similar breakdown scaled up to the times of mortals a good one to shoot for? Should my f2l be roughly the same as my LL, and my cross be about a third of that? This would scale up to 4 sec cross, 12 sec f2l, 12 sec ll for a 28 second solve.
Anyway, my own contribution to the original thread:
Cross - 3-5
F2L - 12-18
LL - 10-18