Quite right, but in any case I find the idea of sharing 'solving times' objectionable. For me, solving a puzzle means savouring the good clues, growling at the bad ones, parsing all the solutions to my satisfaction, and filling the grid. I have no desire to cut out the first three elements of this process, which are the ones that give me most entertainment, nor do I wish to rule out the possibility of a refreshment break.
If you are a novice and you are delighted to have completed a puzzle (albeit perhaps with a bit of help from this forum and the support of a few biscuits) in a single day, finding that someone else 'finished' it in 4 minutes 37 seconds is unlikely to make you more enthusiastic about starting the next puzzle. Indeed it could put you off ever trying to solve another puzzle. Please note that I've got no problem at all with opinions being expressed on relative difficulties - indeed when an expert solver says 'this was a tough one' it can be very reassuring to less-experienced solvers who found the puzzle completely impenetrable.
If people want to hold competitions specifically related to grid-filling speed, that's fine - but they can include me out!
PS far from constituting 'cheating', for me using a dictionary is part of the enjoyment of solving, whether confirming suspicions, discovering new words or finding new meanings of familiar words.