The TT-S still not uses the EA888 engine.
The question is when will the new EA888 engine be introduced in the TT range.
The new 211 hp 2.0TFSI EA888 engine is in use in the new A4.
In the German forum there are also two official Audi mails that confirm that the TTS uses the EA888 engine block,
but as we know that's not the case.