How I see it:

Nissan are willing to do what Tuners do and Porsche is not.

Nissan is moving up the performance ladder and is hoping to cause some upsets at their competitors expense.

By making this public Nissan realize everyone is now comparing them to the king of the road, such flattery and only serves to make them sound more credible.

Porsche has a history and a legacy to protect in the high performance category whereas Nissan does not.

Porsche has a cash cow and Nissan wants to chew on their grass!

Porsche is the tall poppy and everybody wants to have a go.

One thing for sure, we can expect more of this from other marques.