Page size is 175kb. A combination of images and text, it is a retail page for a product.

The product review section contains 12 reviews marked as structured data, validates perfectly with Google's tool. The entire review section is 15KB.

The page load is accelerated using a small js file and base64 placeholder. Fonts are being delayed and pre-loaded by the fontfaceobserver method.

The page receives a 97% rating by gtmetrix, so I infer details like caching, etc. are handled properly.

The page with the reviews fully loads on a smartphone in 1 and a half minutes. Same page without the reviews loads in 24 seconds.

Has anyone experienced anything like this?

Tks.