Her timing with the jokes is pretty bad, she always seems to deliver the joke too quickly or misses the beat.
Yet so many people think she's a riot.
Darling of the ADD set
I agree with regards to her sitcom but I've always liked her in movies. Of course movies are easier to edit to get timing perfect.
She also laughs when delivering her lines. She's too jokey to be realistic. Plus now that I know that horrid Whitney what's her name writes for that show, her lines make me cringe.