A full 757 can do GLA-SFB- full or empty. More likely on the reverse leg though. Would like to see any evidence to the contrary
Complete rubbish, but as to be expected from within Globespan.
Max range B752 with RB211-535E4B approx 3,700nm
Distance GLA-SFB 4,110nm approx.
Factor in wind and whether GSM happen to have ETOPS approval or not on the day you fly.
No way in hell will a full 757 make GLA-SFB/MCO 99% of the time. If they've told you you're flying on a 757, you'll be tech stopping en-route at least outbound.
Tell the truth; your passengers deserve at least that.
ref:
http://www.boeing.com/commercial/air...ps/753sec3.pdf