How to 'Entity Reference' using Rules I am simply trying to autopopulate a Taxonomy Term from Content Type A into Content Type B.

An example, I'm creating a review site for Cars: 

Content Type A = Car Model
field: field_car_model_tag

Content Type B = Car Review
field: field_car_review_tag

Assuming, Content Type A|CAR MODEL has already been created, titled "FORD MODEL".... My users will find and click a "Review Ford" link that routes them to Content Type B|CAR REVIEW, and auto-populates the Node Reference field (Node Reference URL Widget, for example, even though I'm attempting to only use Entity Reference fields).  

After saving this same Content Type B|CAR REVIEW node, I would like this field, 'field_car_review_tag' to automatically populate with it's sister term from Content Type A|CAR MODEL.

In Drupal 6 Rules, I found this to be very straightforward.
I would simply "Load a referenced node, and then set a CCK field without validation", applying the token from the referenced content type.  In Drupal 7, the settings are seemingly endless.  

Thank you for your help!
I believe I've resolved this issue; least it looks good so far.  Super thanks to Alauddin's response to "how to create rules to send email notification for node reference content?"

EVENT 
After saving new content of Car Review

CONDITION


Entity has field
data selector: node:field-car-review-node-reference
value: field_car_model_tag


ACTION


Fetch Entity by ID, with value: node and data selector: node:field-car-review-node-reference:nid
Set a data value, with selected data (that I want to change): node:field-car-review-node-reference:field-car-model-tag


I think I have this right, here is an export of my Rule:

{ "rules_term_ref_4" : {
"LABEL" : "TERM REF 4",
"PLUGIN" : "reaction rule",
"OWNER" : "rules",
"REQUIRES" : [ "rules" ],
"ON" : {
  "node_insert--car_review" : { "bundle" : "car_review" },
  "node_update--car_review" : { "bundle" : "car_review" }
},
"IF" : [
  { "entity_has_field" : {
      "entity" : [ "node:field-car-review-node-reference" ],
      "field" : "field_car_model_tag"
    }
  }
],
"DO" : [
  { "entity_fetch" : {
      "USING" : { "type" : "node", "id" : [ "node:field-car-review-node-reference:nid" ] },
      "PROVIDE" : { "entity_fetched" : { "entity_fetched" : "Fetched entity" } }
    }
  },
  { "data_set" : {
      "data" : [ "node:field-car-review-tag" ],
      "value" : [ "node:field-car-review-node-reference:field-car-model-tag" ]
    }
  }
]
}
}