What's apparent is that some low level nobody at an Irish carrier told someone they'd be upgrading it (and on another thread, a low level tech in Dubai).
But on the Three blog, talking about their "branded" Spica, the Portal, they stated:
"Thanks for your post. Samdroid is an unofficial version of Froyo, not released by Samsung. They’ve advised us due to the limited internal storage of the device that Portal cannot be upgraded to the full Froyo version. In fact as it stands Samsung will not be relasing Foryo for Portal for any operator."
Which is a lot more specific and says they've actually spoken to Samsung.
You can draw your own conclusions, but this sounds to me as if they want us all to buy Galaxy S's.
Well they can f**k off.