Yes - experiencing this problem. While wifi is intermittent and glitchy - when it comes to the App Store, it's a complete bomb. Only about 15 apps on a new iPhone 5 (bought yesterday) and it took hours to update the apps, with repeated fussing. Tried logging out and then in, no help. Seems like some type of SW glitch that impacts wifi and greatly impacts App Store - more so than email or Safari. For example, trying to download SpeedTest, started about 5 minutes ago and it is still loading (only 9.7 MB). I would guess that the intermittent issue in wifi completely confounds some type of secure link in App Store. Probably tries to re-establish the secure link every time the wifi connection glitches.
Hey Apple - when's the fix coming?
SpeedTest on wifi:
iPhone 5 has 56 ms ping, download of 0.30 Mbps and upload of 0.01 Mbps
Laptop - on same wifi network - has 25 ms ping, download of 4.31 Mbps and upload of 2.08 Mbps
Run 2 on iPhone 5: Dead . . . .
Run 3 on iPhone 5: 54 ms ping, download of 0.84 Mbps and upload of . . . still waiting to complete after some minutes
Conclusion: iPhone 5 with current iOS has some serious wifi communication issues (as most already know)