Totally agree chul, W has done pretty much everything faster than E did. Except talking, E was talking more at this stage I think.
here goes:
Rough age: 16 months
Plays with ball: yes - he loves balls. Of any size.
Uses three words regularly (not three words in a sentence!) Yes: no, thank you, there [you] go, up, down
Uses six words regularly: He can say lots more than 6 words but doesn't say them all the time iyswim
Speaks clearly: Yes. People always know what he says when he says no, thank you, there [you] go, u
Scribbles with a crayon: Yes. But he still likes to eat them too!
Walks: Yes
Walks backward: Yes
Runs: Yes
Adopts "no" as his favorite word: Yes! Well it's not his favourite word (up is his favourite word, ie pick me up) but he says it a lot
"Helps" around the house: Erm, he tries to mop if I leave the mop and bucket out. He puts washing in and takes it out of the machine. He closes the dishwasher door if I ask him to and is regularly unhelpful by emptying my pans out of the cupboard or runs around using the pan lids as cymbals 
Puts his fingers to his mouth and says "shhh": Weirdly, he stared doing this last night before I had read the survey! I was saying shh to E and W started copying
Turns the pages of a book: Yes before I've finished reading
Has temper tantrums when frustrated: Oooooohhhhhhh yes
Becomes attached to a soft toy or other object: He loves 'Bob' - a cuddley rabbit thing
Discovers the joy of climbing: I shall refer you to the fact my son broke his arm at 14 months. Nuff said.
Stacks three blocks: Yes, with the megablocks. He can also balance two pringles containers [too many crips in the house emoticon]
Uses spoon or fork: Yes
Learns the correct way to use common objects (e.g., the telephone): Yes to telephone. Can't think of what other common object he could have mastered
He is obsessed with my laptop and I forever find him pressing buttons and changing my screen view the monkey
Takes off one piece of clothing by himself: He always takes his socks off. He will help get undressed but can't take a top or trousers off completely unaided.
Only has one nap (what time and how long?): Yes, at lunchtime for 1.5 to 2 hours
Enjoys pretend games: Erm, don't thnk we really do pretend games. Unless you count when I pretend to bite his ears/fingers/toes - he loves that and laughs his head off
Likes riding toys: Yes and the dogs. We have a fire trucks he rides around and a mamas and papas reindeer rocker that he rocks on
Feeds doll: We don't have any dolls!
Throws a ball underhand: Yes. If I ask him to throw the ball for the dogs he will
Dances to music: He loves dancing. Dances all the time
Sorts toys by color, shape, or size: No
Kicks ball forward: He's been able to kick from a very young age. He started walking at 11 months and was kicking a ball by/before his first birthday. He does really, really love balls though.
Everyone loved their tee shirts this morning at nursery