'Big Sam' came under pressure this summer after a 13th place finish last term, but the West Ham board backed him with the signings of Carl Jenkinson, Aaron Cresswell, Cheikhou Kouyate, Alex Song, Diego Poyet, Morgan Amalfitano, Mauro Zarate, Diafra Sakho and Enner Valencia.
So far, the spending has been totally justified, and Saturday's 2-1 win over reigning champions Manchester City just served to show the progress made by the Hammers.
The star of the show so far has been striker Sakho, who joined from Metz for just £3.5m. The Senegalese striker bagged his sixth goal in six starts last weekend, giving Allardyce a legitimate goalscoring threat in the absence of Andy Carroll.
Carroll, 25, has been sidelined since the summer after damaging ankle ligaments, but after successful surgery, the England international is on the way back to first team action - and he has spoken of his delight at returning to training.
"It's unbelievable [to be training again]", Carroll told the club’s official site. "I've been out for so long that to be back training with the lads again is a fantastic feeling. It has been a difficult few months, being in a dark gym by myself training every day."
"Seeing the lads go out and having the banter and not being as much a part of it that you want to be [is hard], but it's getting closer now and it feels a lot better."
"Just putting the boots on again for the first time is a real lift. That's what you're a footballer for, to go out on the grass and play football. That's where I am now and hopefully I'll be back in the squad soon."