Iphone with 3.1 firmware

I decided to install the 3.1 to see if it made any changes in my iphone , I am not a beta testerfrom apple , I just downloaded it from a site which I will post later once I find it again, but I am still going thru the features. I did notice that applications do start extremly fast , and this is on the 2g imagine how fast it would be on the 3g or 3gs. I will keep ya posted.