I have been reminded by my FTO (LGU- London Metro. Univ.) that first time passes can make a difference.
The logic being that Airlines need people who can pass type rating exams fast., so it looks better if you got 85% + and first time passes, if you have then you have the edge over those who don't when applying for a job.
Having said that, I wouldn't jump of a bridge over it, and this may be overlooked by some airlines if you fit in nicely in other ways.
Plus if demand becomes such that the airlines move the goal posts in your favour it will not matter so much.
But to any body else reading this I would advize you not to put in for exams you don't know you can pass.