I'm not surprised it's him in a way - but the scenario in my head was that if it couldn't be Matthew Wilson, then Carol Klein would get the main presenter role and someone like Toby would join as the junior member of the team. But that's been turned on its head and Toby's the main presenter.
So I'm sad it's not MW, but I had wondered how he'd fit the GW job with his new swanky RHS role. As for Toby, I feel neutral. I enjoy reading his articles in Kitchen Garden magazine, but feel he's too similar to Joe Swift in interests and style for GW to get the shaking up it deserves. However, I'm happy to be proved wrong, wish Toby well and tune in September to find out.
For more entertaining interpretations of today's announcement, The Garden Monkey is hard to beat, though the BBC Gardeners' World Message Board is trying very, very hard. Arabella Sock is in deep mourning with an amended self-portrait to prove it, but has fiendishly swapped sides and is peddling themed merchandise already. EmmaT has resorted to posting cute pictures - shame we didn't see it earlier Emma, it may have helped sway the decision. Victoria is in her best journalist mode and asking for everyone's reaction to the news. As for me? Just as well Esther didn't knit me a balaclava after all...
Update: JAS has commented in style, including a classic reference to Reggie Perrin