I’m assuming he means the smaller speakers won’t output enough for your listening area, thereby losing ’presence’?
And vis-a-vis speakers too big for a room would ’overwhelm’ it, thereby overpowering it with too much presence.
That’s why it’s so important to match speaker size to room size.
Or, is he trying to tell you he’s of the opinion that small speakers suck...
Tell him to knock off being audiocryptic and spell it out!
I know that’s not a word (yet) but it darn well should be!!