I think it really depends what type of industry you're entering. If you're breaking new ground and creating something truly original then you can get away with

I think it really depends what type of industry you're entering. If you're breaking new ground and creating something truly original then you can get away with releasing early and often - your audience is going to be made up of early adopters who are more tolerant of issues. However if you're building a product for a well established industry e.g. if you were building new shopping cart software you would be entering a saturated market full of knowledgable potential clients and full featured alternatives. In this case you need to release when your feature set matches or hopefully exceed that of your competitors.