it seems unfair Tplink positioned like that. tomshardware test results seem to be done within a short distance between access point and client. with the default transmit power is set to high power, of course the bandwidth result will be fluctuates. try changing the transmit power set to low or medium for a short distance and it must be very stable and better results.
this proof:
http://toko.baliwae.com/images/ttplink-tl-wr1043n-set-middle-power-jarak-dekat.jpg
http://toko.baliwae.com/images/tplink-tl-wr741n-150mbps-high-stabil.jpg
this proof:
http://toko.baliwae.com/images/ttplink-tl-wr1043n-set-middle-power-jarak-dekat.jpg
http://toko.baliwae.com/images/tplink-tl-wr741n-150mbps-high-stabil.jpg