Correct Mani. That is, while I would expect the same, I never noticed that either while of course explicitly watching for it. But no. This is how I told about the cooling down (see that quote). But still a guess. Anyway, when that would be in order the "yo-yo-ing" as you said it could be smeared so much that it goes unnoticeable ?
Anyway, to me it is clear that you did not observe the latest findings (on Windows 7 !) with SFS=0.1 and around that value (like 0.11). I mean, then your expression about the SFS low and high values would not have been like how you just did - at all ...