How long does it take an ad to start running?

I just switched to YSM (from AdWords) to test it out and see if there is any difference in conversions or traffic.

I set up a campaign earlier today but it hasn't started receiving impressions yet. Can anyone verify how long it takes for a campaign to run once you activate it? Most of my AdWords campaigns only take a few hrs. to start.

Please advise.

 

The campaign starts up in about 10-15 minutes. You don't see impressions until the next day. YSM isn't in realtime unlike Adcenter/Adwords... You WILL however see your account balance go down if you pre-paid.

 

You should notice traffic in a few hours
There is a difference. Google has a better conversion rate and it has more traffic.