For the first half Yamato and Sora were rarely on screen, let alone interacting with each other. The focus had shifted to their successors with the D3s. But if Toei and everyone had just wiped the 01 DigiDestined completely out of sight they would have had a riot on their hands. So they brought 'em all back in the Digimon World Tour. Six groups sent all over the world, one 01 and one 02. But before they could all set off they had to have their Very Digi Christmas. and this is where it all happened.
Matt, in his typical fashion, had arranged a Christmas concert and automatically drawn a huge crowd. Among them were Taichi, Sora, Koushiro and Jyou (Mimi, I'm sure, would have loved to come if she was still in Japan). The morning before the concert their digimon all come to visit for Christmas and we see Sora approaching the back door of the place Matt's using for the concert, holding a little pressie for him as a token of her... ah... affection. Sora likes Matt. A lot. I think this is sufficient proof, don't you?.
And this is where it all goes wrong. Tai chooses this precise moment to get up his courage and ask Sora to go with him to the concert. 'Not that it really matters or anything, I was just... wondering.' as he said. To which Sora replies: 'I was kinda hoping Matt would be free afterwards...'
The Taito fans worst fears were immediately confirmed. Tai loved Sora. Not Matt. And Sora did love Matt. could it get any worse?
They weren't alone. Taiora lovers were painfully aware of how close they had come to having their favourite pairing officiated. Yamato fangirls immediately went nuts because their beloved bishounen wasn't single anymore. Some Taichi fans supposedly were mad at Sora for 'dumping him' and 'breaking Tai's heart'.