This is what I have been told by a former Rails dev who is now doing Laravel. He said that Rails has much more automatically injected code that behaves in a way you can't anticipate intuitively (and many libraries encourage and extend that behaviour). As a former Rails dev myself I agree with that part.
But isn't this exactly what Symfony users accuse Laravel of - too much magic? Laravel's facades are as magical as anything in Rails and Laravel does a lot of code injection. It takes more than one man's opinion to establish a truth.