Absolutely right. But it also depends on the work or job you do . If its skilled trade job like carpentry. Major role play is first hour or two. Your boss no matter if its owner or foreman. The only thing they look is how you handle your tools and machinery to tiniest details. If you hired as a professional then people can see right away how you use tape major or how you take 4' ×8' sheet of plywood and put on table saw and then cut. If you where given a task how you read a shop drawings. How much time it takes you to make your own cut list and etc. And all of that within hour or two your boss can determine on what level you are or if you are any good at all.