Is Memcached 1MB value limit enforced?

I was running some tests on both Membase & Memcached, to demonstrate membase persistence and I noticed that Memcached does not throw an error when persisting values greater than 1MB size?

I am using spy 2.7.1 as client and
Memcached 1.4.10
Membase 1.7.1

I generated a String of 2Million characters (2MB size)

StringBuilder sb = new StringBuilder();
for (int i=0; i<2000000; i++) {
sb.append('a');
}
value = sb.toString();

and I am still able to insert the value into both Membase & Memcached. Membase makes sense since limit is 20MB, but, Memcached??