For what it's worth, I think the DA42 accelerates fairly promptly on the take-off roll! I can only compare it with various Cessnas, a wheezy Seneca, and a few manic Arrows.
As for take-off performance, it'll take off with 3 decent size men and 40 USG on board, up Stapleford's 22L, which is a 2% upslope, within 600 metres. Admittedly, that's a tarmac runway.
The reported 695 metres of wet grass available at Lands End would encourage me to check my performance figures pretty carefully!