It's being said that there was a problem in reaching V1-V2, and as someone has already posted, in that case setting the flaps/slats configuration wouldn't have a role on that.
So do any of you know in which way could affect the same problem to available thrust?
In other way, does anybody know where the iinformation about that "slow take off" comes from?. (Because it may lose reliability by saying the aircraft didn't reach the necessary 210 km/h = 113 knots, which seems quite slow anyway)