I'm not familiar with the laptop turbo, however I'll give you a quick rundown on what it did (I've disabled it) on my desktop i5.
"Stock" 2.66GHz, though it never ran that speed.
All the time (when loaded) 2.8GHz.
When only 1 or 2 cores/threads, as high as 3.2GHz (though sometimes it would go to intermediate levels).
This is within Intel spec. Technically it does "reduce" the life, but so does turning your computer on. It is quite safe to use.