The correct answer is true because AWS DataSync is designed to simplify and accelerate moving large amounts of data online between on-premises storage and AWS services. It automatically handles many of the tasks related to data transfers that can slow down migrations done through methods like SCP or FTP, such as managing encryption, monitoring the network, and verifying data integrity. In contrast, SCP and FTP are simple file transfer tools that do not offer these advanced features, which can result in slower transfer speeds, especially for large datasets or over long distances.