I always try to paddle out on my feet, but if you are caught on the low side of the bank battling the waterfall it's near impossible to stay up, so where do you draw the line.
Re the tail slides, if you don't count them Ivan Van Vuuren (the Coreban ripper) would never get out of a heat. They have their place it keeps the rider tight in the point scoring pocket of the wave. It also keeps the speed up for the next manoeuvre.
Even on big rail to rail cutbacks the tail can still break free at the end, again where do you draw the line on the slide?
Salter, Fanning ect they slide the sh!t out of their boards.