Device network download performance discrepancies on IOS

Hi all, I ran into an issue where I was comparing the file download speeds of different IOS devices, and I noticed some discrepancies. I was wondering if the community can help me shed light on what might be the cause.

Setup: Computer  with Corona Simulator and XCODE SIMULATOR vs Ipad mini, iphone4s, iphone 5

Network: All are on wifi

Server with files: Digital Ocean loaded with 3 zip files all about 1.5 MB each

Download process: Async Download for all three files

Computer w/ Corona and XCODE downloads and processes all files within 3-5 sec consistently

Ipad, Iphone4S, Iphone 5, download times range from 5s - 1min 20s for all three devices. All devices are on IOS 7.1

Observing the XCODE console I notice that sometimes Daemon media server would shutdown and restart after about 20 sec or so for some of these devices. I do not know what could be causing that.

Anybody can shed light on what might be causing the download discrepancy? The Digital Ocean server seems to be working well, as there are no lags with and of the IOS Simulator or Corona SDK Simulator. What can be causing the clog in the IOS devices?

I am using the network.download api on all counts.