That's not true
I've just installed NIS 2010 and it's really fast.
It's great and fast and have more features now.
I also installed Kaspersky 2010 and its more resource hog than norton 2009 itself.
It's GUI is now marvelous. None other suites come even near to it
Av-test result: *www.thinkdigit.com/forum/showthread.php?t=120651
And in malware detecting it's in front of all other suites
Pcmag test result: *img12.imageshack.us/img12/4513/antisk.jpg
The feature i like is that it has IPS ( Intrusion prevention engine) in browser which prevents any malware from attacking and doesn't blocks the web page unlike other suites which just blocks the web page.
Like KIS 2010 done for me: *www.thinkdigit.com/forum/showthread.php?t=119883
^^It had just read the code written by a user and blocks the hole web page
I had also problem with it's firewall which i can explain but will not believe
And please don't recommended at least AVG to any one It doesn't do well at protecting
It's better to use anti avira personal ,avast home addition and prevx 3
I've not tried NOD32 till now though