I thought the idea behind beta state was for opinions to be formed leading to a better product.
As far as I'm concerned, beta is a software engineering phase. Wikipedia sums it up nicely :
Beta phase generally begins when the software is feature complete but likely to contain a number of known or unknown bugs. Software in the beta phase will generally have many more bugs in it than completed software, as well as speed/performance issues and may still cause crashes or data loss. The focus of beta testing is reducing impacts to users, often incorporating usability testing.
Therefore, because it has bugs, performance and other functionality or usability issues, you cannot seriously form an opinion of a piece of software when its in beta state.