When someone said "Android lags compared to Iphone5", does it mean that Android is SLOWER than Iphone? If this is the interpretation then it is a total NONSENSE. In fact, Iphone5 is SLOWER than Android. Due to Apple obsession with "smoothness" of the user interface, the performance is impacted making the Iphone slow. In terms UI speed, iphone is slow compare to Android. I can easily scroll thru App drawer pages in Android faster than on Iphone springboard. Look at these video for scrolling speed comparison betw Android/iphne Webpages: http://www.youtube.com/watch?v=EH1GDLunomY List: http://www.youtube.com/watch?v=6Dn-8aR_Ht4 (note: this is the case not just in Safari browser but in list/general UI scrolling). Iphone is so much SLOWER than Android due to Iphone wants to maintain the "smoothness". Iphone is like when you do play back of a video and you are stuck at 1x speed. On Android, you can play at 1x, 2x or 4x speed. Thus you can finish seeing the video (i.e. doing the task) faster on Android. Some complained that Android have that occasional slight stutters in the UI but this is due to cpu not able to keep up with speed (just like video playing at 3x speed looks stuttering compared to playing 1x speed) So Iphone LAGS because it needed a bit more smoothness but at the expense of raw speed. Personally, I take speed over smoothness. It is so frustrating using Iphone when you have this smoothness "inertia" when interacting with the UI. I think many Ifans have mistaken smoothness for speed. In fact smoothness leads to slower performance. When I use the iphone, I can immediately feel the Iphone lag/slowness after using my S3. Iphone lag or slowness is also excerbated by its UI design flaw. In a nested navigation scenario (e.g. open link from email then open app from browser then...), it is so tedious and SLOW to navigate back the stack. On Android, you just hit the "back" button. Having a central Settings also slows things down a lot. Even in web pages loading speed Iphone5 lost to Galaxy S3 by this test. http://www.phonearena.com/news/Web-...vs-Galaxy-S-III-vs-One-X-vs-Lumia-900_id35164 Look the the page load speed (with Flash plugin disable in Android browser). The actual page load test is much faster in S3 than Ip5 eventhough the web benchmark shows ip5 to be better. Having a little more smoothness caused too much cpu/gpu power to be dedicated for UI leaving less for more essential processing.