actually, depending on the restaurant (if they are not open for b'fast continually 'til lunch or lunch continually 'til dinner) those times for TS restaurants are not the crowdedest/longest waits/etc because the restaurant may be empty 'til they open at 11 for lunch or 5pm for dinner, so a 5pm dinner ressie could also be a very smart choice!
however, if they are open straight thru (i.e. crystal palace) then *all* times are busy 'cause they never empty out/re-set/re-open...