Hope you're OK wherever you are, Anna 
If the Guardian did genuinely want to show support for trans people and sympathetically feature trans daters in the column, then really the only way that they could that without evoking horrible misogynist overtones of compulsory heterosexuality and the cotton ceiling would be to have a trans woman go on a date with a heterosexual man, with the full knowledge and agreement of both parties.
They didn't, because that isn't the agenda they're pursuing at all.
Even though Anna played by "the rules" and went through with the date, when she invoked what is supposed to be the agreed "I'm just not attracted to you as an individual" graceful get out clause that supposedly excuses a lesbian from being transphobic, that still wasn't enough.
Eight hours to reply to a text message says to me "I am trying to find a way out of replying to this message that won't end up on Bye Felipe" (or wherever women post rejection freak outs these days).
There was literally no way out of this for Anna, unless she agreed not just to a second date, but to whatever Jen fancied by way of a relationship. Anything less and at some point it's "transphobia", and the fucking Guardian knowingly put Anna in that position to prove its political point that lesbians can have penises.