That is a statement that I would agree with, but it is also something that is open to interpretation to say what that confounded particle is really doing. The Bohm interpretation says the particle definitely goes through one slit, but there is a "pilot wave" that goes through both, and coaxes the particle into an interference pattern. The many-worlds interpretation says the particle goes through both slits, but in different worlds, which partially overlap long enough to get the interference before our perceptions pick out one to observe. The Copenhagen approach says that there is no continuous existence of that particle, it is just a mental construct based on its performance in the complete experiment, so it doesn't make much sense to even talk about what it is doing in between. So you can see that different interpretations generate a different language about what is happening in there.
That's a pretty standard interpretation, close to the Copenhagen approach. There isn't much consensus though, on which is the "best" way, and they all seem pretty equivalent.
I don't know on that one.