Magento – Register user product review not reflecting in My account section

You have a typo in your code, bracket is in wrong place:

<?php if( count( $this->getReviewsCollection() > 0 ) ): ?>

It should be:

<?php if( count( $this->getReviewsCollection() ) > 0  ): ?>

However, it's better to use this code if you only want to check size of the collection:

<?php if( $this->getReviewsCollection()->getSize() > 0  ): ?>

Not sure why this is, but I found that by including this <?php $_product = Mage::registry('product'); ?> above the code mentioned in the question. I was able to get it to work. I also moved all the code to it's own .phtml file so that it would only be included on the product view page by adding a couple lines to the local.xml Like so.

<catalog_product_view translate="label">
     <reference name="product.info">
        <block type="core/template" name="reviewCountTabBlock" template="catalog/product/view/tabs/review_count.phtml" />
    </reference>
</catalog_product_view>

Then on the view.phtml I added this:

    <?php echo $this->getChildHtml('reviewCountTabBlock') ?>

and in the new template catalog/product/view/tabs/review_count.phtml I added this:

    <?php $_product = Mage::registry('product'); ?>
<?php 
    // Add this code to get review count
    //$summary         = $this->getReviewsSummaryHtml($_product, false, true); 
    $reviewcount     = $_product->getRatingSummary()->getReviewsCount(); 
    $this->getLayout()->getBlock('product.info.tabs')->setReviewCount($reviewcount);
?>

And that cleaned everything up. I hope this helps others.