You can get 'lock on' when the vac power is so strong but usually only with TM's, especially when a glide is fitted. Lightweight wands used to be called 'scrub wands', designed to be used as not just a rinsing tool, but using the detergent through the wand in a scrubbing or agitating action. Some of us still use this method of 'wanding'. However when they started adding 'glides' the term 'scrub' wand began to disappear as the agitation was lost, and other means came more to the fore, such as rotaries and crb's, followed by a smoother glided wanding, simply for the extraction.
Dave.