it took roughly 20 seconds for me. which is consistent to the speed it took for labris 129mb model based on the size difference.
Anyway , a scene can be made to look really good with smaller textures/ different compression. This is the most common error artists make with real time web targeted 3D. Textures are almost always the culprit and in most all cases they are over kill sizes and lossless png compression and could have had jpg’s instead.
im sure labris model suffers from texture bloat as well because I really cant see anything in his scene that warrants that sort of file size ( i know its just a sample , was just pointing it out )
You can look at my current project i showed a demo of in here :
the total size of every .GLB that loads in the scene is 15mb ( not all at once , lazy loads based on selections ) , ok it is a small scene but that is just geometry … most loaded textures are optimized to use jpg and as can be seen in the screenshots, they still look great.