They have to say "some" players as majority of player base doesn't use forums or won't report they can't log in. There is no way for ZOS to know if it's 2% or 92% of players, hence "some" covers all the bases.
Never understood why people get so upset about the wording of it outside of EU server being down completely
https://www.youtube.com/watch?v=flLoSxd2nNY