Elayne doesn't matter, it's about what Terez said about her. .
As far as I know, all she's said is:
And:
These are the statements you mean, correct? The only other relevant point is her talking about Nynaeve not reaching her potential despite the Cleansing:
To me, this raises the interesting point: forcing happens when you continuously use nearly as much of the OP as you can handle. This makes you reach your potential faster. Does it follow that if you rarely hold the full amount of OP you can, you will reach your potential very slowly?
A strong Aes Sedai who doesn't go about adventuring perhaps won't have to hold all the OP they can very often. Their daily tasks will need very little of the OP, which would be less than what they can hold. Is this the reason for someone not reaching their potential?
We know from the books that some Aes Sedai rarely leave the Tower. A Brown, or even one of the other Ajah that is primarily an administrator, may rarely use the OP much, and certainly not all they can. Am I close?
Hope I get there before the encyclopedia...