You could just as easily get the opposite effect: if the login page is polished and snazzy, the user may well have the same expectation of the product itself, and every sharp edge will be that much more visible.
If the login page is simple and generic, the message is way toned down. Similar to the advice of not polishing the front-end too much if the backend barely works because clients will expect that a finished interface means a finished product.
If the login page is simple and generic, the message is way toned down. Similar to the advice of not polishing the front-end too much if the backend barely works because clients will expect that a finished interface means a finished product.