In the true Liquid layout, your content expands and contracts to fit your user’s browser window in a meaningful, calculated and intelligent way. Thus, it is more than just setting the width of the columns and containers as a percentage.
Well, this can lead to an increase in perceived quality. Done bad, it's a usability nightmare.
Going Liquid is a huge pain in the grains. The pain is worth it, although if the theme / client / product (s) on which you build the site has strong visual quality for them (I think the summer blockbuster movie site), they require a certain fit and finish, or if it is necessary to display large pieces data.
Note. I will update this a bit later with links to good examples and quotes for my statements.
Rob allen
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