Am I the only one who has never seen a halfway performant Flutter app? Also, the examples seem odd? The "Universal Studios performance and reliability" section

Am I the only one who has never seen a halfway performant Flutter app? Also, the examples seem odd? The "Universal Studios performance and reliability" section doesn't say anything about performance. And the LG example just states that native apps are better than web-apps with no further info. So that's 2 production performance examples where performance was apparently not good enough that they feel confident to share any metrics?