No, it doesn't. That's a huge assumption
What is a huge assumption? Future Trunks giving more or less the same fought Goku give to Cell? Yea, it's an assumption, but it fits well with him saying he could fight them fairly well. Goku could fight Cell fairly well, Freeza (100%) could fight SSJ Goku fairly well. That's the same type of situation IMO.
Trunks did anything of note in his battle.
Why not? Trunks said he could fight them fairly well, so I think Trunks did something of note.
Trunks said he was absolutely no match for the Androids as a Super Saiyan
Piccolo also said FPSSJ Goku was no match for Cell. Tao Pai Pai was also described as being no match for Goku (post Karin), despite being able to fight him fairly well. Granpa Gohan also said he was no match for Son Goku, despite them fighting pretty evenly. Being no match doesn't have to imply a large gap IMO.
Also, Trunks said that they should wait Goku. But even if Trunks = future #18 and Vegeta = future #17, they would most likely end up losing. What it does imply is that they all cannot be much below the future duo, since ganging up would work, which goes hand in hand with Trunks being able to fight them IMO.
Main timeline #17 and Future #17 are entirely different, though.
The difference consists on Future #17 being entirely bad and enjoying from destruction, while present #17 not. That doesn't imply their conceptions of someone being a good toy or not is different. Present #17 said he was playing with Kamiccolo, despite the being equal, while future #17 said they would lost a "good game". I don't see how this does imply Trunks is far weaker, seeing present #17 considered he was playing with an opponent = to him.
Android saga Trunks never fought the Androids. I'm talking about the Trunks that fought the Androids and supposedly isn't too far from them in power. That Trunks is far weaker than the Androids. Naturally Android saga Trunks would do better, but that's not really the point here.
We are arguing about Android saga Trunks, who should be >> Mecha saga Trunks. And I think he fought against the Androids again, since he said he could fight them fairly well, whereas before the gap between them was huge.
Also, if Trunks did not fight the Androids again, would not this invalidate future #17 and Future #18's comments about Trunks being a "play" (which I don't think has to imply Trunks cannot fight them well)? If they don't know how strong is Androids saga Trunks, their statements must be referring to Trunks Mecha saga, no?
#17 doesn't need to state the exact same thing he said to Gohan to prove a point. He said Trunks "redefined the word fool" for challenging them again, which gets the point across just fine.
#17 did not say that in the Steve Simmon's translations, he only said that no one looks good wasting their strength. If #17 did not say what he said to Gohan (I did not use even half of my power), he probably did not hid power from Trunks IMO.