It 's still not clear exactly why NBC is dumping Leno , the king of late night in all key audience measurements , including advertiser-prized 18- to 49-year-olds . Ed Bark : Jay Leno , inexplicably dumped as `` Tonight Show '' host , has final show Thursday . He says critics have n't been big fans , but public was ; his Nielsen ratings dominate late-night . Score: 6 Bark : Fallon likable and appeals to younger crowd , but short on some late-night host skills .
Ed Bark : Jay Leno , inexplicably dumped as `` Tonight Show '' host , has final show Thursday . He says critics have n't been big fans , but public was ; his Nielsen ratings dominate late-night . Score: 6 Bark : Fallon likable and appeals to younger crowd , but short on some late-night host skills .