it's/that's not saying much, etc.

it's not saying much

It is rather unremarkable, unimportant, or unimpressive (that something is the case) relative to someone or something else or some broader picture. True, the economy has improved under this president, but it isn't saying much if you consider how his predecessor left things. A: "So you are a better cook than your wife, who hates cooking?" B: "Yeah, I know, it's not saying much."
See also: much, not, saying

that's not saying much

That is rather unremarkable, unimportant, or unimpressive relative to someone or something else or some broader picture. Well, the president has managed to get the economy to a better position than where his predecessor left it, but then that's not saying much. I'm a slightly better cook than my wife, but that isn't saying much.
See also: much, not, saying
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

it’s/that’s not ˈsaying much, etc.

used to show that what you have just said is not particularly remarkable or impressive: She’s a better player than me, but that’s not saying much (= because I’m a very bad player).
See also: not, saying
Farlex Partner Idioms Dictionary © Farlex 2017
See also: