It is mentioned in one of the papers (or possibly the doctoral thesis, which is nice as it gives an overview of the whole chain of improvements) that it can still happen but that it is much better compared to what they benchmarked it against (boehm, iirc). Hard to tell if it delivers what it promises though..
It would be very interesting to run our sample with Timers on this GC. In that paper I found a link to their implementation, but unfortunately it is unavailable.
Link is dead, but code is on Github somewhere. Dunno where I found the link to it but I am away from computer for a few days so I can't really look it up for you.
