Jack - we're consistent.. no "standard" across the board. HOWEVER, each agent and each brokerage has a standard - so ask the people you're looking at hiring. Also, since buyer's agents are largely compensated by the listing agent as a split of that fee, you can determine what is competitive in your market place by asking any agent to look at similar properties (type, area, price point) and run the listings and see what compensation is being offered by those sellers/agents. That will give you a "range" of normal within your geographic location. My experience is that compensation is higher for land and commercial than residential, but only up to a certain price point and then the % drops. Let's face it 1% of 12 million is a lot of freakin' money...10% of $10,000 is not, especially when split with brokerages, and deducting expenses like the computer, mls fees, realtor association dues, electricity, auto, insurance, gas, paper, pens, phone - all things that your agent needs to be able to conduct business with you.
Hope this helps.