I managed to put up a sleek theme with a faithful iOS 7 look in a 'less than 5MG' Winterboard theme. Which makes it extremely fast. I owe credit to many people from whom I recompiled this theme after some editing/tweaking/optimizing. I will try to credit them soon.

Lock screen, battery, keypad
(No slide, just tap to unlock)

Home screen, Settings, Contacts
(Apple and 3rd party icons, general UI)

SBSettings, Notification Center, Spotlight search
(Moodded weather icons, ColorKeyboard)

BiteSMS, WhatsApp
(iOS7 BiteSMS theme, moodded WhatsApp)

Please comment if you like it!

Link to compressed file Download from Mediafire