WPPoland: Elementor → Gutenberg rebuilds yield ~40% mobile site speed increase (multi-client benchmark)

Claim: WPPoland agency, citing dozens of client migrations: Elementor → Gutenberg rebuilds yield "a 40% increase in mobile site speed" on average.

Source: WPPoland — https://wppoland.com

Confidence: Single-source (vendor portfolio aggregation).

Use carefully: Vendor-published, so treat as directional. The direction-of-effect is consistent with Anubiz Host: Elementor adds 500KB+ of CSS/JS to every page; simple pages can have 2000+ DOM elements (Elementor's structural overhead) and Elementor own admission: Flexbox Containers ship 40% less HTML output than sections/columns (Elementor's own 40% admission). The number 40% recurs across independent sources — it's probably real.