Could easily be interpreted as meaning BT Broadband customers have priority install for their upgrade over new customers signing up for BT Infinity. I can't say if this is true or not.
That was my first thought, but it is very unlikely. Every company I have known, in several industries, prioritises getting new customers in over upgrading existing ones. In the specific case of FTTC they can easily cope with doing both on any specific cabinet.
I reckon it's just a rogue salesman, possibly not even a direct BT employee.
My broadband basic info/help site - www.robertos.me.uk
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Connection - Plusnet
UnLim Fibre (FTTC). Sync ~ 56.6/14.1Mbps @ 600m. - BQM
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