Here's a graph with almost 1.6 million hands:
This 1.6 million hand import took roughly four and a half hours. I'll leave it to you to calculate the hands per second on that. I fixed a bug today that increased the already fast import speeds by 80%.
The generation of the graph took about 85 seconds or so.
Those numbers are subject to change, but should give you a pretty good idea of what to expect out of PT3, performance wise.