Yes that smell is very common!!!, I also like it!!! .
What we've been doing its not exceed of 4.500rpm in the first 2.000kms...But well there is always present those engine revs, seconds after the ignition,,COLD START, that is the real sound,,after some revs of only 2.500rpm to 3.500rpm, when standstill and cold start, then do not pass of 4.500rpm for the first 2.000kms(Well pass it when the engine is warm, only some times though) ..Our 997S has now 3.000+-kms and is a beast!!........