Plenty of people get more than $1 per click, it just depends on the niche. Health, insurance and tech niches tend to be among the best paid and it would be entirely normal to get $1+ per click.
i head that if anybody downloads firefox or google pack from adsense, then it pays $1 to that publisher is it true ?
Hmm yes they pays but not on regular basis . This depends on advertisers , if someone want top place in any niche than they make big bids or otherwise most of them stay in medium range .
It seems to vary so much. I can get a $1.50 click and then the next click on the site can be $0.20. Although the finance niche seems to be between $0.75-$2.00 most of the time.