The manufacturer swears when the module is unplugged the Engine will revert to factory. Are you suggesting the diagnostic record will document the chip installation? Even then you typically can wipe the ECU through a battery disconnect procedure of some sort.
Guess I'm living on the edge
I've read Ford's service advisor checklist procedure for determining if an aftermarket mod voids the warranty, and two of the things they mention is to check the ECU last reset timestamp, and the ECU reset counter, to look for evidence that someone has been flashing or modifying the ECU. Every time the ECU is flashed, modified, reset, or the logs and history cleared, it records that event in semi permeant memory which cannot be hidden, bypassed or altered without disassembling the ECU electronic chip by chip to reprogram them all individually.
For example, you bring your car in with a turbo failure or blown intake manifold gasket, the tech wants to look for evidence you were running modified software to allow higher boost pressure. He plugs in and confirms that your ECU is running all the stock settings, but it was just re-flashed 2 hours ago... Alternatively he finds it was last reflashed 6 months ago, but it's been reflashed 35 times since it left the factory....
Also lets not forget these cars have EDR's (Event Data Recorder) in them too, which are like aircraft "black boxes" designed to record hundreds of parameters of data about the vehicle in the moments leading up to a crash, and be strong enough to ensure that data survives said crash. It's entirely possible the EDR could also be designed to independently log things like ECU resets / flashes, and engine parameters outside normal design specs, like boost pressure more than X% above specified design maximum 22 PSI.
Now do I think these engines can handle another 60hp peak, and could a chip deliver another 60hp peak from these engines? Yeah, probably, though I'd be far more believing at 20-30hp. Will you have problems from running it which would cause warranty issues to be concerned with, possible but unlikely, at least in the next 10-20k miles.
What does concern me is the risk of worsening carbon deposits from the modification. Direct Injection engines are already known to suffer compression and power loss problems from carbon buildup on the intake valves not present in regular manifold and port injection engines since they don't get the benefit of the wet fuel to wash the carbon deposits off the intake valves into the combustion chamber to exit with the exhaust. It is this reason some people suggest that direct injection engines last longer from harder driving styles and somewhat regular WOT pulls to redline to try to knock buildup off the valves which can accumulate under low load and low rpm operation.
