I have done ALOT of tiptronic runs, with my '06, just for fun. I have found that the trans. needs to be tapped a hair before red line. If it is not none in this manner I have noticed that there is a slight hesitation that sometimes kicks in the rev limiter. I guess, with enough practice that you tap point could be more exact. This is what I feel is the only way to determine your particular EXACT tap points. At first I was tapping right at red line and 30% of the time the rev limiter kicked in. Once you hit the rev limiter you have also lost any advantage you may have had just recovering the shift. On the traction control option, I get too much wheel spin with TC off. After more experience that will be mostly eliminated. Currently I use TC on and it still gets a huge tire chirp before actually hooking up. I feel the ONLY way to get the right formula on YOUR particular car is through ALOT of practice. I used a G-Tech meter a couple of times and both times were 6.5 sec. 0-60. I know there is alot more power to be had, at least 1/2 sec. faster than my time. Researching the Internet I have seen 0-60 times at 6 sec. That is really NOT bad being a bone stock, V-8, sedan. As you know there are computer tunes etc. that will give you even better times. That is my 2 cents anyway.
My '06 LS is BY FAR my most favorite car out of ALL of the cars I have owned. I am 50 yrs. old and have owned everything from a big block Mercury Cyclone to a 4 cyl. Ranger pick-up.