I couldn't agree with you more on this review. These are unequivocally the the best gloves I have ever owned. They are light, cool, and comfortable, but offer a surprising amount of protection. Essentially unnoticeable until the point where you really need them.
I'm pretty sure they saved my riding season last summer. I was travelling along a good pace, I'd guess 18-20 something km/h, when I slightly misjudged my line and clipped a boulder that protruded out into the trail with my right pinky. The impact was solid enough that it hurt a fair bit and I let out some sort of expletive, but I kept on with my run. When I got to the bottom of the trail I took a moment to take off the gloves and check out my finger. It turned out that the impact had split the skin on my knuckle through the armour on the glove. There is no way to know definitively, but I'm fairly sure that without the protection on the gloves that impact would have resulted in a broken finger. All I can say for sure is that it was a very solid impact and that for such light weight and comfortable pair of gloves they offered a truly surprising amount of protection. Yes they cost a bit more than some other gloves out there, but given the extra margin of safety they seem to offer I'd be hard pressed to find a reason to ride in anything else anytime soon.
As a side note, it's interesting to hear you say that you find the large to fit snugly for a large. I pretty much always wear an XL glove and found that the Leatt XL is a little loose compared to what I would normally expect. I ordered mine off the web because none of the local shops were carrying them. When its time to replace them I'd like to try a large to see if that might be a better fit for me.