EDIT: Since some people don't get it, this thread is about the following patch note:
I have 161 Enhancing and 152 Healing on my 59 WHM. These are skills that normally skill up VERY slowly (unless healing offensively on undead, of course).The rate at which combat and magic skills increase during low and middle levels has been adjusted.
There is no doubt in my mind that the skillup boost is affecting me at these levels. I am seeing a massive improvement.
What really got my attention was that my very first casting of buffs (Prot 3, Shell 3, Reraise 2) immediately netted me 0.3 enhancing and 0.3 healing.
Anyway the point of this post is that the "low to mid levels" definitely goes past the 150 mark, so (speculation inc) it probably stops at 200 skill.