I had to mail my return in this year, it's been 2 weeks and yesterday it showed received on wmr. How long does it take to be approved?

I had to mail my federal return this year. I put tracking on it so i know it got to the IRS on Feb 9th 2017. Yesterday exactly 2 weeks after my taxes got to the irs i checked wmr and it says received. How long will it take to be approved? Will it be longer because I had to mail my return this year instead of efile? I'm getting it direct deposit so i at least don't have to wait on a check!