Hi Brett,
Yes, I think it is all things equally.
The software has had one or two small changes, voltage and current controlled power unit giving better control of the wire element temperature, shape of the working area (tip) of the wire element together with more flexibility in the high current connection cables (allowing better free vertical movement of the wire element) have all contributed to making the improvements. There is currently a lot of experimentation with different pre-coatings of the wood together with a search for the best type of wood to use.
Overall these guys certainly deserve my congratulations.
Tweakie.