He has only been at school half a term. Don't worry about him being able to write his name. As for the phonics, I would practice with him a little bit every day. Make sure he knows his letter sounds really well. As for blending, model it to him. Ie. say the letter sounds fairly quickly, you need to say the first letter sound quite loudly and then whispher the others.
We made practicing word boxes a bit more interesting by making a letter box. If my son got the word right then he got to post the word.
Has your son's teacher spoken to you? Why are you worrying. Its still early days. Provided that you practice with him it will come.
There is a really simple solution to your problem snottynoses ...
... don't compare
Seriously though, your son doesn't sound as though he's behind to me. How has he settled in school? Is he managing the school routine? Can he dress/undress himself after PE? Is he making friends? These are the things that count IM humble O.
Mention if at parents evening if your really worried, but he sounds like he's doing great
Can't believe he can read that many words my dd is in yr 1 and probably can read no more than 15 words but we are on the learning through play thingy in wales where they do not sit and do work but learn through their play experiences - no pressure,doing what children of this age should be doing - playing. ds in reception is only doing letters not words - they learn one letter a week again through play ie songs, making a giant octopus in the middle of hte room for the letter O and lots of other related activities. So no not behind at all.