Default G2 Wifi TKIP/AES

So I just used my jump upgrade to get this phone a couple days ago. I didn't know there would be such a big wifi issue with this phone. Turns out the phone gets good download speeds if the security on the router is set to TKIP. If it is set to AES or a mixture of TKIP/AES then the phone maxes out at 3mbps for me. This wouldn't be a problem but if I change the router at my home to TKIP only then all other devices max out at 15-20 when normally they'd be at 60 mbps on TKIP/AES. This is a big problem for me and I want to go exchange the phone without having to pay the 50 dollar fee. Do you think they will do it?

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