gistfile1.js

var layer = new FeatureLayer(...);
var updateEndHandler = layer.on('update-end', function (args) {
  if (args.error || (args.info && args.info.queryLimitExceeded)) {
    //Possibly could just use layer.on('query-limit-exceeded', function () { ... });
    console.log('could not draw all features at this extent');
  } else {
    //BUT what we really want to catch is this case
    console.log('able draw all features at this extent');
  }
});