Do West Ham have strength in depth?

Big Sam suggests our squad will be most severely tested in November and December in today's Evening Standard. Certainly injuries might start to mount and players who have performed in the World Cup like Enner Valencia might suffer.  But looking at our squad it's a lot stronger than last season. I'm assuming our best team is Adrian: Jenkinson, Tomkins, Reid, Cresswell; Song, Noble, Kouyate, Downing; Valencia, Sakho. So in reserve that leaves Demel, Collins and O'Brien in defence, who can all do a decent job. In midfield there's Amalfitani, who looks a really good player, Kevin Nolan who can come on and score a goal, plus Poyet who is promising, and £9 million Matt Jarvis. While up front we have options with the £15 million Andy Carroll, Mauro Zarate and Carlton Cole. So that's ten quality reserves in the squad, plus Ravel Morrison, currently on loan at Cardiff, if he can ever fulfil his potential and Jussi as our back-up keeper. All of which leaves me feeling fairly optimistic for the season.