I think you're connecting to band 41 at that range, since it's located at the Hilton. I work at Chase at Easton and we do not get band 41 in my location due to several big buildings being in the way, so the speeds are not nearly that great.
Actually, you may be on to something. Just ran a Speedtest and I got 7 down, normally my speeds have been in 1.5-2.5 down. I'm at -119 dbon band 25 here, 41 can't reach me here.