i will try it again and reconfirm at school tomorrow..i only suffer it when im using the school's wifi..where the signal is not so strong does not have problem in my home or in starbuck..but regardless it doesnt bother me

tested on a medium weak wifi, without case with no covering = -70dbm, with case = -67dbm, with palm covering antennae part + case on = -58dbm.. so, it does weaken but depending on your wifi signal strength and hand placement.. i dont use my phone with finger or palm covering back so no probs for me..

btw i replicated those on Galaxy S1, same issues.. it weakens too when i place palm at the back.. its not just sensation.. but what makes things look serious is the algorithm of how signal bar adjust to -dbms.. its quite too sensitive on Sensation thus making ppl go hype on the issue... check the dbm and u will know its not that bad