Yes. We limit the galleries from SmugMug to about 50 images. But we do this for a few reasons:
Our BlogSites are built to be portfolio sites where the idea is to show the best of the best of your work. Even 50 is overkill for that. The goal should to show your best work and get potential clients to contact you.
SmugMug was built as a browsing/proofing/sales tool. Any one event could have thousands of images in a gallery. So they load a few at a time, then you click to the next screen to see more.
If we were to allow those HUGE galleries to load into our sites, galleries with hundreds of images would kill your page speed and be useless as a portfolio.
The two sites have some great tools that the other does not offer. Using them together can create some great sites with the best of both worlds.