Probably a bit of 'feels like that'. We scored 16 in 8 games at the end of last season., and 11 in 6 prior to the managerial change.
We've now scored 11 in 7 - so really a continuation of the form of the previous 14 games which is a delight, but not necessarily a sudden transformation.
Bielsa could speak decent enough English, there are some funny interviews of him correcting his own interpreter for misunderstanding the question. I think he used it as a convenient shield from the media, he was happy to make interviews awkward. All part of his mystique I guess.