Certainly has, I remember the first time I saw him (away at Yeovil, season before last), he looked decidedly shaky, but even then his shot stopping was excellent, he has developed now to be up there with the best we've had.
To be fair to Davies, the first time I saw him play was against MK Dons, when they beat us resoundingly 5-3. He didn't have a great game, but his performance was nowhere near poor enough to justify the scoreline - the defending that day, from front to back was abysmal, and a certain Dele Allli ran absolutely riot, so I always felt that the criticism he got after that was very unjust. He doesn't command his box enough for me, and his decision making sometimes is a little off, but his shot stopping and distribution are real assets, and he's turning into a real unsung hero this season, and long may it continue.
Genuienly think the only thing he does wrong is his kicking and thats occasional and his tendency to hold onto the ball too long when throwing it out