Back concurrency down to 5 (from 50!)

lib/util/cmd.js

@@ -8,9 +8,12 @@ var createError = require('./createError');
 
 // The concurrency limit here is kind of magic. You don't really gain a lot from
 // having a large number of commands spawned at once, so it isn't super
-// important for this number to be large. However, it would still be nice to
-// *know* how high this number can be, rather than having to guess low.
-var throttler = new PThrottler(50);
+// important for this number to be large. Reports have shown that much more than 5
+// or 10 cause issues for corporate networks, private repos or situations where
+// internet bandwidth is limited. We're running with a concurrency of 5 until
+// 1.4.X is released, at which time we'll move to what was discussed in #1262
+// https://github.com/bower/bower/pull/1262
+var throttler = new PThrottler(5);
 
 var winBatchExtensions;
 var winWhichCache;