Lan did take wounds from a few people in New Spring, once when he was surprised and taking 6 people on at once, the other time when he was going against his old teacher, who he just discovered was a df, so was probly shaken a little by that. Also the person he was going against was a blademaster. Plus Lan was still in training. So yes Lan did get hurt a bit in NS, but I think this does not detrackt from his credibility as a blade master.
Sorry if there are some mistakes in there, It's been awhile since I've read NS.