Simply put: yes. It's important to choose the right type of deployment and to make sure your controller matches the size of your organization.
Usually your choice of controller will depend on the number of devices that typically attach to a wireless network. A large office building that has hundreds of workers has different needs than a small business.
Some controllers, such as the Catalyst 9800-80 Wireless Controller, are built to handle the traffic of a large organization. That same controller would be overkill for a small business. Similarly, a controller like the Cisco 3504 Wireless Controller is intended for smaller business offices and manages a few access points--it would never be able to handle the day-to-day activity of a large enterprise.
