Souf, I agree with what you said.
Opera mini has been a drag for the last year now. The full version of Opera does work well however.
Yes, with a Windows phone you're likely to have some problems, however you have given me a few clues as to how to fix it, so I will continue to work on it.
I have the full version of win 8.1 on a laptop, so I can test the metro IE to an extent, but I'm sure it's a bit different on windows phone.