Sorry but my impression is also enough a fact. I did say it "seems to me".

PR1.2 + Swappolube = PR1.3 , so far with, my usage pattern.

Swappolube was the only way to reach 14 days of up time with reasonable interface responds fluidity.
How Nokia did optimize the system further might be interesting to find out later but for me it is too early to jugde if Swappolube needs to come to the rescue with PR1.3 like it did for PR1.2 lagging.
Swappolube being experimental for most, we just need to get to know what to expect and what not from PR1.3 before we feel the effect of finetuings is positive or negative.