It all depends on what wired connection you are comparing with what wireless
the commonest Wired connections run at 100Mb/s whereas the commonest wireless networks 802.2g run at 54Mb/s wired connections range from 10Mb/s upto 1Gb/s whilst wireless runs from 11Mb/s to about 250Mb/s so there is some overlap in the ranges.
However any internet connection is based on maximum allowed by the ISP which in your case would be 860kbps which is way below the network speeds of either wired or wireless, so would not be effected by the switch.
Generally wired connections are faster that wireless but only really apply to local networks
