9630 Trackball

I have heard many people complain about dust and other particles interfering with the trackball on their 8330s as early as within 6 months of use. The Bold has been out around 6 months, actually a bit less, so I have not yet heard of many complaints (or none to my knowledge actually) about such problems with the trackballs on the Bolds. As such, I was wondering if there is anything different in the 9630's trackball so as to prevent, or minimize, said problem? or is the 9630's trackball (other than possibly the color) the same design-wise as the 8330s, and Bold?

It feels like the one in the bold for sure.

It is actually more like the one on the 8900...which is a good thing :)