Very true but not always the case to be fair.Which is probably the case and may or may not have already happened. For all anyone knows, Kane and/or Grealish may now be City players officially, but the announcement not made because they are on their break. You don't break a signing of that stature and size without them at the stadium, holding up the shirt.
When we beat off a host of clubs to sign Glauber Berti, it was announced and he was in Brazil, I think he also stayed there during his time with us.