He's at least right that Rosol's place in the draw will be looked for. Janowicz? Perhaps not so much. Losing to Basic, who lost to Zverev, who lost 0-6, 0-6 to Federer was not an indication of grass greatness to come imo.
Youzhny is a much better grass player, but noone will seriously believe he can take down a top-4 so his place in the draw won't be very anticipated.
Agreed on just about all of it, although the whole Basic->Zverev->Double bagel logic isn't very good.
A lot of the dark horses are picked on the odds of having a stunning day and causing an upset. The title is going between 4 guys, I think we can all agree on that.
Then you have the ones that can take out one or possibly even two from the big 4. At the bottom you have noticeable players (Rosol) and other players who probably won't do very much, but can definitely beat a few of the bigger names (not top 4, just below that).
I don't see Youzhny, although a fine grasscourter, causing an upset. Same with Ferrer, decent players, probably beat who they'll have to beat. But they lack the weapons that other, lower ranked players DO have that made me pick these players.