In my experience lawnmowers and snow blowers are different animals when it comes to sticking. For snow blowers snow/ice accumulating within the impeller housing and the chute can substantially impact performance. A variety of techniques are used to reduce sticking including spray lubricants and waxing, all of which have their place.
For mowers, negative performance issues are rarely a major concern when it comes to grass sticking; it's more an issue of cleaning and maintenance. If you have a metal deck, periodic spraying could be a benefit. If your deck is plastic (like my Honda), there's no advantage to treatment.