S30V is known to be a very hard, abrasion resistant steel...and many times hardness equates to being brittle as well.

I have no doubts that my Gerber Freeman Hunter in S30V would break more easily than many of my other knives if stressed enough...but unlike the masked madman at knifetests.com I won't be putting mine in a vice and hammering on it with a sledge. That said, it holds an edge better than anything I've ever owned and never ceases to amaze me with slicing prowess.

On a side note...my Gerber LMF II survived the sledge treatment as per the knifetests.com testing criteria...as well as many other treatments mine will never see unless I'm burried under a ton of cinder blocks and car doors and have to dig my way out.

PS: I should mention that hard doesn't always mean brittle...how the metal is treated makes all the difference.