I generally don't like doing spin tests, they are a poor indicator of bearing performance but here's my neglected bike and bottom bracket when I did my twice yearly clean. This spin test highlights the benefits of good bearing alignment more than the friction in the bearings.
The bearing friction is minuscule compared to the loss through misalignment.
This bottom bracket is a racing model with NTN bearings.
![](https://i.ytimg.com/vi/d9PD6_6bsKI/mqdefault.jpg)