Congratulations on reaching that landmark. I haven't really concentrated on Adsense that much although I am about to so it is very encouraging to see that you have done what I want. Hopefully I will be posting here soon to say something similar.
if you have 300-400 uniques/day, and let say 3-4 pageviews/uniques, it's mean you get 900-1600 impressions/day. with CTR 0f 30% you have 270 - 480 clicks/day. With your earnings 1k in a month that gives you ~7 too 12 cents/click which is normal i think. that 30% CTR is really awesome, is that clicks come from visitors from search engine?
I agree. My ctr and cpc is pretty good, now I just need to get my traffic up.....that is the hardest part in my opinion. But, I am working on it. Anyway, OP, Congrats! Keep up the great work~