With the basic Paypal account and with most companies, if your amount due is $10 you will see $10. Most companies tell you how long it will take for payment--usually in the range of 4-6 weeks. From the time they 'authorize payment' or mark the job 'paid' it is usually 3-5 business days before you have a check, have a paypal deposit or have a direct deposit. If you are paid by paypal you will get an email announcing payment and the money will be in your paypal account. You can start the withdrawal/transfer process immediately to your bank account, and that usually takes 3-4 business days. I presume that those who have paypal debit cards can use the funds immediately.
Paypal is a fast service. From time to time I do online surveys with a company from whom I usually have payment via Paypal the next business day. Therefore I have to assume that longer delays have to do with the bookkeeping at the companies we work with.