Chrome is the best browser out there on laptops. Naturally a lot of people are interested in trying it out on the iPhone.
The app store ranking is determined by number of downloads in the last 5-6 days. Since it just launched, a spike in downloads and a subsequent rise in rankings is expected. Whether it stays on top in the coming weeks/months will determine how it compares to other apps.
Only if you have as much memory as a desktop. Chrome is painful to use on anything with limited memory, even with very limited plugin use. (Roughly 20 megs per extension and 50 megs per tab).
I've had much better luck with Safari, even the Windows version. No lastpass for Safari Windows though :(
The app store ranking is determined by number of downloads in the last 5-6 days. Since it just launched, a spike in downloads and a subsequent rise in rankings is expected. Whether it stays on top in the coming weeks/months will determine how it compares to other apps.