How long does it take for your ad to show up in searches with Google Adwords?

Does anyone have experience using Google Adwords?

“Your ads can begin running once you’ve done three things: Sign up for an AdWords account, create your first campaign, and submit your billing information.” – Google
But there could be a delay of upto 48hrs. even though you have completed all the above requirements. It depends on your ad and landing page if adwords programme sees some sort of irregularity in your campaign then it may delay your ad.