It's fair to say that ...   ...と言ってもいいだろう(過言ではない)

It's fair to say sushi is enjoyed around the world.

It's fair to say that a lot of governments are losing control of the counterinsurgency.

counterinsurgency ｶｳﾝﾀｰ ｲﾝサーｼﾞｪﾝｼｰ n)対ゲリラ戦

It's fair to say English is the world's favorite language.