My initial impressions so far is that in this version of the OS, WIFI is more responsive. I connect to routers faster and get the UMA connection much quicker then in previous versions of the OS. Browsing via WIFI also sseems quicker.

My memory leak issues seem to be better (I have not used my BB like usual, so I cannot say that the memory leak issues have been solved in this OS.) While I have not taxed my BB like I usually do due to the holidays, my available memory has not diminished over the last few days of use - like it did in prior versions of the OS. (Since running into low memory warnings - in a few days, my BB went from 8M free to less then 1M free, I typically check available free memory once a day.)

On the downside, I have noticed one small potential glich. When scrolling through my messages and opening e-mails, the BB sometimes seems to be "sluggish" to "non-responsive" for a few seconds, kind of like the system is completely taxed. After a few seconds, the BB responds as usual. Anyone who spins the trackball and the cursor does not move knows how annoying this can be. This has happened a few times now, so, I do not consider it an isolated event.