I've had my 06 6MT for about a year and a half. I drive traffic every morning and every night in downtown Montreal. I've noticed the way the clutch shifts has gone down in "easyness".
Once it gets broken in, its very mechanical and makes a lot of noise. I have gotten used to it, but it still annoys me sometimes. I just chalked it up to be unrefined Nissan clutches....
I have driven manual cars all my life, and started with motorcycles at the age of 11 (now 30). The G clutch/transmission is the worst in terms of refinemment, but it does the job. You just have to get used to it. From a stop in first, I found the best RPM range to be about 1500 RPM to take off smoothly and with the least chatter possible. Adjust for uphill starts accordingly 1500-2000 RPM.
When I drive my GF base civic, its a whole new world.... I think they use butter in them because it shifts soooooo smoothly.
Hope this helps
Oh yeah, I still make mistakes once in a while (lack of attention or when distracted), and believe me, the G will make you feel that mistake!