After extensive testing since the console release of TTT2, Harada has finally confirmed on Twitter that TTT2 indeed has 1 frame of lag on both Arcade, PS3, and 360 versions of the game. See the exact quotes and testings done after the jump.
Thankfully, the legend Noodalls was present to give a far better ranslation:
Jiyugaoka_Kaz: "Good evening Harada-san. I have a question regarding offline mode in the home version. After playing in T6 practice mode, I went into the TTT2 practice mode, and clearly felt some lag. I've heard that there might be intentional lag in the offline mode, but what is the reason for this?"
Harada_Tekken: "In truth, the home version of T6 was faster than the arcade version. The arcade version had a JV board in the circuit, so the game was delayed X(秘 frames*. In addition, even though the HDMI output is the same as the home version, the Noir Monitors would lag about one frame when it finished rendering to the bottom right. TTT2 is the same as the arcade version"
Personal Note from Noodalls: "*Can't tell if this is a typo, or some slang that I don't understand. The part about the Nori monitors isn't exactly clear either, but if I had to guess what it all meant, in the arcade version the JV board adds some lag, and the monitors they use on the arcade setup add some lag as well, so the home version is pretty much the same as that."
Thankfully, Noodalls provided pictures showcasing the button inputs on a Playstation TV that is known to induce 2 frames of lag but since the same TV is used for both versions being tested, that variable is controlled. Here it is in GIF format
The PS3 registers the LP button exactly one frame later compared to Tekken 6. And to prove that there is parity between the PS3 and 360 versions you can see it exemplified in the video below:
And as a bonus, here another testing done by fellow TZ member gl0ry and he does the same test but in the end he compares it to a 5 bar connection online. To those who are too lazy to see the video, remarkably a five-bar connection only induces 1 frame of lag that shows how good the online mode can be in this game.
Once again, thank you so much to Noodalls and gl0ry and everyone involved in investigating this matter.