nasty.js

var fetchAll = function () {
    var deferred = Q.defer(),
        parsedCount = 0,
        allData = [];

    var addData = function (err, data) {
        parsedCount += 5;

        if (err) {
            console.error(err);
            deferred.reject(err);
        } else {
            console.log('Fetched ' + parsedCount + '/' + allUrls.length);
            allData = allData.concat(data);
        }

        // Check for completion
        if (parsedCount >= allUrls.length) {
            console.log('resolving fetchAll');
            deferred.resolve(allData);
        }
    };

    for (var i = 0, l = allUrls.length; i < l; i += 5) {
        serviceCall({
            Action: 'UrlInfo',
            'UrlInfo.Shared.ResponseGroup': 'Rank',
            'UrlInfo.1.Url': allUrls[i],
            'UrlInfo.2.Url': allUrls[i + 1],
            'UrlInfo.3.Url': allUrls[i + 2],
            'UrlInfo.4.Url': allUrls[i + 3],
            'UrlInfo.5.Url': allUrls[i + 4]
        }, addData);
    }

    return deferred.promise;
};