These two answers basically summarize my main opinions on the matter.
No girl is interested in a fake 'Mr. Nice guy' act accompanied with ulterior motives; as long as his kindness is genuine though, it shouldn't be a problem. Ofc it's probably wise to keep in mind that there are malicious/selfish people out there who may interpret his kindness as an invitation to take advantage...I don't think that's a female-specific trait though. Akin to many other circumstances in life, it obviously never hurts to exercise [a reasonable amount of] caution. He should keep a safe distance in the early stages of the courting process imo; better safe than sorry and all.
Authenticity is also important, esp. if he's not willing to drag out the courting for too long.
1) It'd allow both of them to actually get to know each other...and if they do end up together, their minds could be at ease knowing their partner selected them fully aware of both the good and bad (a.k.a, no 'surprises' that could later lead to the rise of deal-breaker issues in post-marriage life), and,
2) I think it could also build trust and a sense of comfort/security. Imo, it reveals the guy is principled and has a clear value system. It's also telling of his strength/ability to make certain judgement calls when necessary; you need someone who you can trust to be reliable. (*The single exception to this, are the guys who hesitate to be fully honest or may even tell white lies -either to be polite or in an attempt to spare their potential partner's feelings-...usually this is due to a certain personality/upbringing style though (introverted, shy, or anxious guys), so I believe most girls would be able to identify that and take an understanding approach).
Wanting to move slowly doesn't make a girl a /[intentional] time-waster either. What do the following three have in common: thirstiness, moving too serious too fast, and constant attention? It's a lot of pressure! and also signals desperation, which then signals RED FLAG (what's the rush??). It also reflects badly on his standards; does he believe every girl he meets is high quality?? What does that say about his discerning abilities?
Girls don't like to be pressured-- most of the time they like to think it's their idea/choice + they like to feel special.
*DISCLAIMER*: It goes without saying, but, not all girls think the same though. You should def. keep their individual personality in mind throughout.