Freshpaint is a good example to use. Especially since it uses the native pen drivers, not the wintab.
Photoshop CC properly updated uses the native drivers.
CS6 Uses wintab
Having simlar results in all apps.
Including: Maya, Z-brush (& Skulptris)
The problem in my opinion is getting the pen to say it's @ 100% or maximum pressure. This prevents clean lines.
We just need to turn down the threshold as my pen at least tracks different levels of pressure appropriately, just too hard to get it at or close to max to make it useful.
I have a much more powerful pc, and I have been pairing the Intous Pen & Touch to my SP3, super pissed about this. Defeats the whole purpose of the tablet, basically using like I do with the desktop or laptop for drawing now.