I'm curious whether SAS Multi-Insert technology actually invokes something similar to PL/SQL "forall" inserts. The speed is very similar on systems that I'm using. Both are almost the same speed assql*loader
This specific question is best answered by a SAS/ACCESS developer.
Try to get an answer via tech support, or if you attend Global Forum - grab someone at the demo stations.
In my mind, there are some situations when bulkload is faster, especially for really large loads.