Fallon had fantastic ratings in his first week:
http://www.huffingtonpost.com/2009/0..._n_174585.html
NBC's "Late Night with Jimmy Fallon" attracted an average 2.4 million viewers the week of March 2, against CBS' "Late Late Show with Craig Ferguson," which averaged 1.9 million viewers, according to final Nielsen figures released Thursday.
In their opening night clash, Fallon scored 2.9 million viewers against Ferguson's 1.9 million.
Jimmy Fallon finished his first week as host of NBC's "Late Night" franchise on top, beating all cable and broadcast competition while also besting incumbent Conan O'Brien's season average.