[TECK]

it depends on your database size. if you have a small database, ya is fast. but on a large site it can last even 30min, so is not misleading.
I specified this clearly in the tutorial:

NOTE: If you have a large database, it might take up to 20 minutes until your backup is done. Relax and smoke a cigarette or grab a snack.
When done, you will see in the SecureCRT window, the command prompt.

You will not see the prompt until the backup is done.
for your question, yes. it does contain all the time all data stored in your database. and the bigger is your database to higher will be the lap time until you complete it.