Is that to their US datacenter or the European (Amsterdam) one? So far the European one has been pretty snappy for me, ping is ~20ms from my home ISP (Germany) and TTFB is good enough that I can instantly saturate my 300MBit home ISP line with concurrency of ~ 500 downloading small objects (5b-1MB), but I haven't looked at min/max/avg/median yet.

BIG gotcha btw: You have to choose between US and EU when you create your B2 account! You can't have buckets in the other location, so that means you'll need two accounts if you want to do that.