Sorry, I'm not a native English speaker, as you probably realised. I'll try to remember this.
I didn't read it anywhere. To read something as ... is an expression used in English.
Senna isn't driver who is consistent enough to be any benchmark. He has proven at Lotus that his pace fluctuates. He has proven at Williams that his pace fluctuates compared to Maldonado. If anything, I would rather consider Pastor as a driver who is consistently quick in qualifying. Since the problem with too litle DRS effect is solved at Williams (since Spain), Maldonado didn't really lack qualifying speed at any occasion.
Senna hasn't been like that at any other time this season, so I think the car must have been particularly good.
But well, there are no evidence and it's impossible to prove if my or your version is correct. But I remember Williams saying after Hungary that it was Senna better than usual than the car better than usual.