I've noticed this twice now. I drive my S on Thursdays and I have to sit in Atlanta traffic. Stop and go...stop and go. Mostly first and second gear for long stretches of interstate in certain sections.
Here's what happens. First gear stop and go. Every now and then from a complete stop or a slow role, the S will hesitate. Nothing violent or stalling out...just kind of bogs down like there is no power. RPMs are nornmal (meaning not too low to where it will stall like it will for someone learning to drive a stick). Temp is normal. No CELs or any kind of lights. Car runs like a champ! All it takes is some clutch and a little more gas. But this happens when the RPMs are around 2500 or 3K (I forgot now).
Anyone experience this? Maybe nothing.

 

Someone posted about it a few days ago.. your question is answered here:

https://www.s2ki.com/forums/index.php?showtopic=380314

I don't miss I-75/I-85 traffic one bit.. 14 lanes across of bumper to bumper just isn't right.

 

WOW! Thanks for the linky.
My eyes are now open. Never thought there was a problem...just figured it was either operator or another quirk of the S. Glad to read all the posts. Stop and go blows!

 

yup, another quirk of our cars. it should go away on its own within a couple days at most.